Zinc Oxide Hazard Summary Identification Reason for Citation How to Determine If You Are Being Exposed Workplace Exposure Limits
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Understanding Pigments: the Third Step to Higher Quality And
Understanding Pigments: The Third Mark Harber October, 2000 Step to Higher Quality and Consistency Putting great color in your product is part of the pigments. However, they are less opaque and systems approach for resolving issues of sub- would have to be used at higher loading levels to standard properties and appearance. achieve similar whiteness and opacity. This article on pigments is the third in a four-part Titanium Dioxide is used in the majority of the series about the interrelationship of the material products made by the cast polymer industry. Tita- components used in marble and solid surface nium Dioxide-based colors include most whites, manufacturing. These AOC-authored articles re- pastels, earth tones and off-whites such as bone, spond to the challenge that the cast polymer in- ivory, beige or biscuit. As noted in Table 1, non- dustries aspire to higher standards of quality and white synthetic oxides are combined with Titani- consistency. Because resolving cast polymer is- um Dioxide to create pastels and earth tones for sues requires a systems approach, other articles cultured marble and solid surface applications. in this series address resins, gel coats and pro- cessing. All articles begin with background infor- Phthalocyanine pigments, or "Phthalos," impart mation on the main subject matter, followed by deep colors such as the automotive "Hunter ten related issues and guidelines. Green" of a sport utility vehicle or the high strength Blue used in ballpoint pens. Because A BACKGROUND ON COLORANTS they are so deep when used by themselves, In their natural state, cast polymer resins meet a Phthalo Blue and Phthalo Green are normally variety of performance requirements but are lack- blended with other pigments, many times Titani- ing in the color that draws the customer to the um Dioxide. -
Acute Exposure Guideline Levels for Selected Airborne Chemicals: Volume 11
This PDF is available from The National Academies Press at http://www.nap.edu/catalog.php?record_id=13374 Acute Exposure Guideline Levels for Selected Airborne Chemicals: Volume 11 ISBN Committee on Acute Exposure Guideline Levels; Committee on 978-0-309-25481-6 Toxicology; National Research Council 356 pages 6 x 9 PAPERBACK (2012) Visit the National Academies Press online and register for... Instant access to free PDF downloads of titles from the NATIONAL ACADEMY OF SCIENCES NATIONAL ACADEMY OF ENGINEERING INSTITUTE OF MEDICINE NATIONAL RESEARCH COUNCIL 10% off print titles Custom notification of new releases in your field of interest Special offers and discounts Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the National Academies Press. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Request reprint permission for this book Copyright © National Academy of Sciences. All rights reserved. Acute Exposure Guideline Levels for Selected Airborne Chemicals: Volume 11 Committee on Acute Exposure Guideline Levels Committee on Toxicology Board on Environmental Studies and Toxicology Division on Earth and Life Studies Copyright © National Academy of Sciences. All rights reserved. Acute Exposure Guideline Levels for Selected Airborne Chemicals: Volume 11 THE NATIONAL ACADEMIES PRESS 500 FIFTH STREET, NW WASHINGTON, DC 20001 NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Insti- tute of Medicine. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance. -
Evaluation of Metal and Noise Exposures at an Aircraft Powerplant Parts Manufacturer
Evaluation of Metal and Noise Exposures at an Aircraft Powerplant Parts Manufacturer HHE Report No. 2018-0001-3349 April 2019 Authors: Karl D. Feldmann, MS, CIH David A. Jackson, MD Analytical Support: Jennifer Roberts, Maxxam Analytics Desktop Publisher: Jennifer Tyrawski Editor: Cheryl Hamilton Industrial Hygiene Field Assistance: Scott Brueck, Jessica Li, Kevin Moore Logistics: Donnie Booher, Kevin Moore, Mihir Patel Medical Field Assistance: Deborah Sammons, Miriam Siegel Statistical Support: Miriam Siegel Keywords: North American Industry Classification System (NAICS) Code 336412 (Aircraft Engine and Engine Parts Manufacturing), Oregon, Welding, Tungsten Inert Gas, TIG Welding, Inconel, Stainless Steel, Chromium, Hexavalent Chromium, Hex Chrome, Chrome Six, Chrome 6, Chrome IV, Crvi, Cr(VI), Nickel, Cobalt, Biomonitoring, BEI, Noise Disclaimer The Health Hazard Evaluation Program investigates possible health hazards in the workplace under the authority of the Occupational Safety and Health Act of 1970 [29 USC 669a(6)]. The Health Hazard Evaluation Program also provides, upon request, technical assistance to federal, state, and local agencies to investigate occupational health hazards and to prevent occupational disease or injury. Regulations guiding the Program can be found in Title 42, Code of Federal Regulations, Part 85; Requests for Health Hazard Evaluations [42 CFR Part 85]. Availability of Report Copies of this report have been sent to the employer and employee representative at the facility. The state and local health department and the Occupational Safety and Health Administration Regional Office have also received a copy. This report is not copyrighted and may be freely reproduced. Recommended Citation NIOSH [2019]. Evaluation of metal and noise exposures at an aircraft powerplant parts manufacturer. -
Sunscreen Faqs
Sunscreen FAQs What type of sunscreen should I use? There are two main types of sunscreen ingredients: physical sun blockers and chemical sunscreens. Physical sunscreens prevent ultraviolet light from reaching your skin, and contain either zinc oxide or titanium dioxide. Physical sunscreens protect against UVA and UVB damage. Physical sunscreens are preferred for patients with sensitive skin or children. Chemical sunscreens rely on an interaction between the sun and the chemical to protect your skin. Examples of such chemicals are avobenzone, octinoxate, homosalate, padimate O, and many others. Chemical sunscreens can protect against UVA, UVB, or both types of damage, depending on which ingredient is used. Read the label to ensure coverage for both UVA and UVB exposure. There are new ingredients being developed that take chemical sunscreens and stabilize them to prolong their activity (i.e., Helioplex, Mexoryl). Does the SPF really matter? In laboratory testing, there are minor differences between SPF 15 and SPF 30 or greater products. However, that data is based on using 1 oz. (30 gm.) of sunscreen for each full body application (the size of a shot glass). Most people use far less in real-life settings. For that reason, we recommend an SPF of at least 30. It is common to find good sunscreens with SPF ranging from 45-70. To maintain protection, reapply sunscreen every 1-3 hours, depending on sweating, water exposure, and sun intensity. Is sunscreen alone enough to protect my skin in the sun? In some cases, yes. However, if you are in the sun for longer periods on a regular basis (such as gardening, golfing, boating, sports), it may be better to add sun protective clothing or habits. -
9.1 Appendix a Minimum Respiratory Protection for Cutting and Welding Processes
Safety Policy and Procedure Policy Number 015 Authorized By: The Cianbro Companies Alan Burton Title: Welding and Cutting Hazard Assessment Program Effective Date: 09/16/95 Page 1 of 12 1 Status 1.1 Update of existing policy, effective 06/03/11. 2 Purpose 2.1 To provide guidelines and requirements to protect team members from the hazards associated with welding, cutting, and burning operations. 3 Applicability 3.1 This policy applies to all subsidiary companies and departments of the Cianbro Companies. 3.2 All organizations are required to comply with the provisions of this policy and procedure. Any deviation, unless spelled out specifically in the policy, requires the permission of the Safety Director or designee. 4 Definitions 4.1 Adequate Ventilation: Used in this policy means any of the following: Local exhaust ventilation is used to capture fumes or in open area with adequate air movement or adequate dilution ventilation with directional air flow away from team member. 4.2 Air Arc (Carbon Arc): A cutting process by which metals are melted by the heat of an arc using a carbon electrode. Molten metal is forced away from the cut by a blast of forced air. 4.3 Bug-O BUG-O Systems Inc.: A manufacturer of a system of drives, carriages, rails and attachments designed to automate welding guns, cutting torches and other hand held tools. 4.4 Cad Welding: An exothermic (gives off heat) welding process that fuses conductors together to form a molecular bond with a current-carrying capacity equal to that of the conductor. Typically used in grounding systems. -
Nitrogen Dioxide
Common Name: NITROGEN DIOXIDE CAS Number: 10102-44-0 RTK Substance number: 1376 DOT Number: UN 1067 Date: May 1989 Revision: April 2000 ----------------------------------------------------------------------- ----------------------------------------------------------------------- HAZARD SUMMARY * Nitrogen Dioxide can affect you when breathed in. * If you think you are experiencing any work-related health * Nitrogen Dioxide may cause mutations. Handle with problems, see a doctor trained to recognize occupational extreme caution. diseases. Take this Fact Sheet with you. * Contact can irritate and burn the skin and eyes with * Exposure to hazardous substances should be routinely possible eye damage. evaluated. This may include collecting personal and area * Breathing Nitrogen Dioxide can irritate the nose and air samples. You can obtain copies of sampling results throat. from your employer. You have a legal right to this * Breathing Nitrogen Dioxide can irritate the lungs causing information under OSHA 1910.1020. coughing and/or shortness of breath. Higher exposures can cause a build-up of fluid in the lungs (pulmonary edema), a medical emergency, with severe shortness of WORKPLACE EXPOSURE LIMITS breath. OSHA: The legal airborne permissible exposure limit * High levels can interfere with the ability of the blood to (PEL) is 5 ppm, not to be exceeded at any time. carry Oxygen causing headache, fatigue, dizziness, and a blue color to the skin and lips (methemoglobinemia). NIOSH: The recommended airborne exposure limit is Higher levels can cause trouble breathing, collapse and 1 ppm, which should not be exceeded at any even death. time. * Repeated exposure to high levels may lead to permanent lung damage. ACGIH: The recommended airborne exposure limit is 3 ppm averaged over an 8-hour workshift and IDENTIFICATION 5 ppm as a STEL (short term exposure limit). -
Synergistic Effects of Zinc Oxide Nanoparticles and Bacteria Reduce Heavy Metals Toxicity in Rice (Oryza Sativa L.) Plant
toxics Article Synergistic Effects of Zinc Oxide Nanoparticles and Bacteria Reduce Heavy Metals Toxicity in Rice (Oryza sativa L.) Plant Nazneen Akhtar 1, Sehresh Khan 1, Shafiq Ur Rehman 2, Zia Ur Rehman 1, Amana Khatoon 3, Eui Shik Rha 4,* and Muhammad Jamil 1,* 1 Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat 26000, Pakistan; [email protected] (N.A.); [email protected] (S.K.); [email protected] (Z.U.R.) 2 Department of Biology, University of Haripur, Haripur 22620, Pakistan; drshafi[email protected] 3 Department of Environmental and Botanical Sciences, Kohat University of Science & Technology (KUST), Kohat 26000, Pakistan; [email protected] 4 Department of Well-Being Resources, Sunchon National University, Suncheon 540-742, Korea * Correspondence: [email protected] (E.S.R.); [email protected] (M.J.) Abstract: Heavy metals (HMs) are toxic elements which contaminate the water bodies in developing countries because of their excessive discharge from industrial zones. Rice (Oryza sativa L) crops are submerged for a longer period of time in water, so irrigation with HMs polluted water possesses toxic effects on plant growth. This study was initiated to observe the synergistic effect of bacteria (Bacillus cereus and Lysinibacillus macroides) and zinc oxide nanoparticles (ZnO NPs) (5, 10, 15, 20 and 25 mg/L) on the rice that were grown in HMs contaminated water. Current findings have revealed that bacteria, along with ZnO NPs at lower concentration, showed maximum removal of HMs from polluted water at pH 8 (90 min) as compared with higher concentrations. Seeds primed with bacteria grown in Citation: Akhtar, N.; Khan, S.; HM polluted water containing ZnO NPs (5 mg/L) showed reduced uptake of HMs in root, shoot Rehman, S.U.; Rehman, Z.U.; and leaf, thus resulting in increased plant growth. -
42 the Reaction Between Zinc and Copper Oxide
The reaction between zinc and copper oxide 42 In this experiment copper(II) oxide and zinc metal are reacted together. The reaction is exothermic and the products can be clearly identified. The experiment illustrates the difference in reactivity between zinc and copper and hence the idea of competition reactions. Lesson organisation This is best done as a demonstration. The reaction itself takes only three or four minutes but the class will almost certainly want to see it a second time. The necessary preparation can usefully be accompanied by a question and answer session. The zinc and copper oxide can be weighed out beforehand but should be mixed in front of the class. If a video camera is available, linked to a TV screen, the ‘action’ can be made more dramatic. Apparatus and chemicals Eye protection Bunsen burner • Heat resistant mat Tin lid Beaker (100 cm3) Circuit tester (battery, bulb and leads) (Optional) Safety screens (Optional) Test-tubes, 2 (Optional – see Procedure g) Test-tube rack Access to a balance weighing to the nearest 0.1 g The quantities given are for one demonstration. Copper(II) oxide powder (Harmful, Dangerous for the environment), 4 g Zinc powder (Highly flammable, Dangerous for the environment), 1.6 g Dilute hydrochloric acid, approx. 2 mol dm-3 (Irritant), 20 cm3 Zinc oxide (Dangerous for the environment), a few grams Copper powder (Low hazard), a few grams. Concentrated nitric acid (Corrosive, Oxidising), 5 cm3 (Optional – see Procedure g) Technical notes Copper(II) oxide (Harmful, Dangerous for the environment) Refer to CLEAPSS® Hazcard 26. Zinc powder (Highly flammable, Dangerous for the environment) Refer to CLEAPSS® Hazcard 107 Dilute hydrochloric acid (Irritant at concentration used) Refer to CLEAPSS® Hazcard 47A and Recipe Card 31 Concentrated nitric acid (Corrosive, Oxidising) Refer to CLEAPSS® Hazcard 67 Copper powder (Low hazard) Refer to CLEAPSS® Hazcard 26 Zinc oxide (Dangerous for the environment) Refer to CLEAPSS® Hazcard 108. -
Emerging Technology
INDUSTRY NEWS EMERGING TECHNOLOGY Iron-based superconductors reinforce link to magnetism BRIEFS A new class of iron-oxyarsenide-based superconductors discovered earlier this year shares IDES Inc., a plastic similar unusual magnetic properties with previously known high-temperature superconductors materials information based on copper-oxide materials, report researchers at the National Institute of Standards and management company, Technology, Gaithersburg, Md. The work emphasizes a critical but as yet unexplained link be- and Firehole Technologies Inc., a tween magnetism and high-temperature superconductors. developer of innovative The importance of magnetism to high-temperature superconductors is remarkable because simulation technologies magnetism strongly interferes with conventional, low-temperature superconductors, but now for composite materials may prove to be an integral element of such materials. and structures, have The team used neutron beams to demonstrate that, like copper-oxide superconductors, the entered into a strategic new iron-oxyarsenide HTc materials discovered by Japanese researchers share an unusual partnership to develop a magnetic structure with magnetically active layers interspersed with layers of nonmagnetic searchable composite material. materials database. For more information: Qingzhen Huang, National Institute of Standards & Technology, 100 www.ides.com Bureau, Gaithersburg, MD 20899; tel: 301/ 975-6164; [email protected]; www.nist.gov. Intel Corp., Samsung Electronics, Copper nanowire arrays grown on different surfaces and Taiwan A simple process to grow upright copper nanowires on a variety of materials is under develop- Semiconductor ment by researchers at the University of Illinois in Urbana Champaign. The nanowire arrays Manufacturing could be suitable for field-emission displays, a new type of display technology that promises to pro- Company (TSMC) vide brighter, more vivid pictures than ex- have reached agreement on the need for industry- isting flat-panel displays. -
Are Welders More at Risk of Respiratory Infections?
Editorial Against this background, a new paper Thorax: first published as 10.1136/thoraxjnl-2016-208464 on 21 April 2016. Downloaded from Are welders more at risk of respiratory published in this edition of Thorax suggests that welders also have higher rates of upper infections? respiratory infections.15 The findings come from two parallel lines of investigation, David Coggon, Keith T Palmer both focusing on employees at a shipyard in the Middle East. In a cross-sectional survey, welders reported a significantly higher Welding of metals generates a complex mix lobar pneumonia, is clearly affected, but prevalence of respiratory symptoms than of noxious gases and fumes,1 and has been data on mortality by occupation suggest an other manual labourers in winter months linked with various respiratory diseases increased risk also of non-bronchial pneu- (OR 2.31). And in a longitudinal analysis of including metal fume fever,2 asthma,3 monia caused by other microorganisms.56 consultations at the staff medical centre, COPD4 and possibly bronchial carcin- Various mechanisms have been pro- welders consulted for respiratory infections oma.12In addition, there is now strong posed that might explain the hazard. One (mainly of the upper respiratory tract) more and consistent epidemiological evidence theory is that inhaled iron acts as a nutri- frequently than other manual labourers. that welders are at increased risk of infec- ent for microorganisms, promoting their Again, the difference was greater in winter tious, lobar pneumonia. Originally growth.12 This would accord with the (adjusted incidence rate ratio 1.47) than in detected in national analyses of occupa- observations that propensity to infections summer (1.33), but it was significant in tional mortality,5 the hazard was confirmed is increased in patients with sickle cell both seasons. -
The Oxidation of Carbon Monoxide Using a Tin Oxide
THE OXIDATION OF CARBON MONOXIDE USING A TIN OXIDE CATALYST Christopher F. Sampson and Nicholas J. Gudde United Kingdom Atomic Energy Authority A.E.R.E. Harwell, Didcot, Oxon. United Kingdom SUMMARY This paper outlines some of the steps involved in the development by the United Kingdom Atomic Energy Authority (UKAEA) of a catalytic device for the recombination of carbon monoxide and oxygen in a C02 laser system. It contrasts the differences between CO oxidation for air purification and for laser environmental control, but indicates that there are similarities between the physical specifications. The principal features of catalytic devices are outlined and some experimental work described. This includes measurements concerning the structure and mechanical properties of the artifact, the preparation of the catalyst coating and its interaction with the gaseous environment. The paper concludes with some speculation about the method by which the reaction actually occurs. INTRODUCTION During the late 1970's, the United Kingdom Atomic Energy Authority at Harwell became involved in sol-gel technology as a result of oxide fuel development. The sol-gel method was found to be suitable for the preparation of catalytic materials which eventually led to their use in car exhaust catalytic converters and for air purification catalysts. Such catalysts were usually in the form of coatings applied to supporting artifacts such as monoliths, formed from either cordierite or from a corrosion resistant metal such as Fecralloy steel (R). The UKAEA has experience in the use of sol-gel catalysts for CO removal from air and so has a technological link to a system intended to recombine O2 and CO formed in sealed C02 lasers. -
Zinc Oxide Sulfide Scavenger Contains a High-Quality Zinc Oxide
ZINC OXIDE ZINC OXIDE sulfide scavenger contains a high-quality ZINC OXIDE. The very fine particle-size of ZINC OXIDE scavenger results in a maximum amount of surface area for fast, efficient sulfide scavenging. It reacts with sulfides (see APPLICATIONS below) to form ZnS. This precipitate is an insoluble, inert, fine solid that remains harmlessly in the mud system or is removed by the solids-control equipment. Typical Physical Properties Physical appearance ������������������������������������������������������������������������������������������������������������������������������������������������������������������������������ White to off-white powder Specific gravity .......................................................................................................................................................................................................................... 5.4 – 5.6 Bulk density ........................................................................................................................................................................................................ 164 lb/ft3 (2627 kg/m3) Applications Under operating conditions, ZINC OXIDE scavenger reacts with sulfides to form ZnS, as shown in these equations: Zn2+ + HS- + OH- → ZnS ↓ + 2+ 2- H2O Zn + S → ZnS ↓ INC XIDE Z O scavenger is effective at the pH levels found in drilling fluids. It is recommended that a pH above 11 be maintained whenever H2S is - 2- expected. This high alkalinity converts the dangerous H2S gas to less toxic bisulfide