Chapter 6.5 Fluorides
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CHEMICALS of PUBLIC HEALTH CONCERN and Their Management in the African Region
H H C Hg H N C OH O O HO OH OH CHEMICALS OF PUBLIC HEALTH CONCERN and their management in the African Region REGIONAL ASSESSMENT REPORT 4 JULY 2014 AFRO LIBRARY CATALOGUING-IN-PUBLICATION DATA Chemicals of public health concern in the African Region and their management: Regional Assessment Report 1. Chemically-Induced Disorders – prevention & control 2. Environmental Exposure 3. Polluants environnemental – adverse effects – toxicity 4. Hazardous Substances 5. Risk Management 6. Health Impact Assessment I. World Health Organization. Regional Office for Africa II.Title ISBN: 978-929023281-0 (NLM Classification:QZ 59) © WHO REGIONAL OFFICE FOR AFRICA, 2014 Publications of the World Health Organization enjoy The mention of specific companies or of certain copyright protection in accordance with the provisions manufacturers’ products does not imply that they of Protocol 2 of the Universal Copyright Convention. are endorsed or recommended by the World Health All rights reserved. Copies of this publication may be Organization in preference to others of a similar nature obtained from the Library, WHO Regional Office for that are not mentioned. Errors and omissions excepted, Africa, P.O. Box 6, Brazzaville, Republic of Congo (Tel: the names of proprietary products are distinguished by +47 241 39100; +242 06 5081114; Fax: +47 241 initial capital letters. 39501; E-mail: [email protected]). Requests for permission to reproduce or translate this publication All reasonable precautions have been taken by the – whether for sale or for non-commercial distribution – World Health Organization to verify the information should be sent to the same address. contained in this publication. -
United States Patent Office Patented Jan
2,732,410 United States Patent Office Patented Jan. 24, 1956 2 The process can be carried out in various ways. Thus, 2,732,410 the vaporized halogen fluoride can be passed, if desired PROCESS FOR PREPARNG TETRAFLUORO with an inert carrier gas such as nitrogen, argon or helium, ETHYLENE BY REACTING CARBON AND through a column of carbon heated at a temperature of A BINARY HALOGEN FLUORDE at least 1500 C. in a suitable reactor, e. g., a graphite Mark W. Farlow, Holly Oak, and Earl L. Muetterties, tube placed inside a resistance furnace or an induction Hockessin, Dei, assignors to E. I. du Post de Neois's furnace. The gaseous reaction products are then imme and Company, Wilmington, Del, a corporation of Dela diately treated, as described below, to remove any un Ware reacted halogen fluoride and any free chlorine or bromine, 0 in order to minimize or eliminate the possibility of their No Drawing. Application January 12, 1955, reacting with the tetrafluoroethylene present in the re Serial No. 481,482 action product. A preferred mode of operation consists in 4 Claims. (C. 260-653) reacting the halogen fluoride with the carbon electrodes of a carbon arc, where the temperature is estimated to be in This invention relates to a new process of preparing 15 the range of 2500 to 3500-4000 C., and again immediate compounds containing only carbon and fluorine, or car ly removing from the effluent gas any halogen fluoride and bon, fluorine and another halogen, such compounds be free reactive halogen which may be present. -
Sulfur Hexafluoride Hazard Summary Identification
Common Name: SULFUR HEXAFLUORIDE CAS Number: 2551-62-4 RTK Substance number: 1760 DOT Number: UN 1080 Date: April 2002 ------------------------------------------------------------------------- ------------------------------------------------------------------------- HAZARD SUMMARY * Sulfur Hexafluoride can affect you when breathed in. * If you think you are experiencing any work-related health * Sulfur Hexafluoride can irritate the skin causing a rash or problems, see a doctor trained to recognize occupational burning feeling on contact. Direct skin contact can cause diseases. Take this Fact Sheet with you. frostbite. * Exposure to hazardous substances should be routinely * Sulfur Hexafluoride may cause severe eye burns leading evaluated. This may include collecting personal and area to permanent damage. air samples. You can obtain copies of sampling results * Breathing Sulfur Hexafluoride can irritate the nose and from your employer. You have a legal right to this throat. information under OSHA 1910.1020. * Breathing Sulfur Hexafluoride may irritate the lungs causing coughing and/or shortness of breath. Higher WORKPLACE EXPOSURE LIMITS exposures can cause a build-up of fluid in the lungs OSHA: The legal airborne permissible exposure limit (pulmonary edema), a medical emergency, with severe (PEL) is 1,000 ppm averaged over an 8-hour shortness of breath. workshift. * High exposure can cause headache, confusion, dizziness, suffocation, fainting, seizures and coma. NIOSH: The recommended airborne exposure limit is * Sulfur Hexafluoride may damage the liver and kidneys. 1,000 ppm averaged over a 10-hour workshift. * Repeated high exposure can cause deposits of Fluorides in the bones and teeth, a condition called “Fluorosis.” This ACGIH: The recommended airborne exposure limit is may cause pain, disability and mottling of the teeth. -
Effect of Vitamin D on Chronic Behavioral and Dental Toxicities of Sodium Fluoride in Rats
Fluoride Vol. 36 No. 3 189-197 2003 Research Report 189 EFFECT OF VITAMIN D ON CHRONIC BEHAVIORAL AND DENTAL TOXICITIES OF SODIUM FLUORIDE IN RATS Perumal Ekambaram,a Vanaja Paulb Chennai (Madras), India SUMMARY: Adult female Wistar rats were treated daily for 60 days with so- dium fluoride (500 ppm NaF = 226 ppm fluoride ion) in drinking water, alone or in combination with vitamin D (200 IU/kg by oral intubation). Throughout the period, food intake was measured daily. Body weight gain, exploratory motor activity (EMA) rota-rod motor coordination, dental structure, brain acetylcho- linesterase (AchE) activity, and serum fluoride and serum calcium concentra- tion were determined 24 hr after the last treatment. Serum fluoride concentra- tion increased markedly in the NaF-treated animals and was accompanied by decreased food intake, reduced body weight gain, impairment of EMA and motor coordination, dental lesions, inhibition of brain AchE activity, and hy- pocalcemia. Administration of vitamin D along with NaF prevented hypocal- cemia. However, the toxic action fluoride on motor coordination, brain AchE activity, and the teeth was not prevented in these animals, probably because vitamin D is not able to decrease the level of fluoride in the serum. Therefore, vitamin D has only limited value as a protective dietary factor against chronic toxic effects of fluoride. Keywords: Dental lesions; Fluoride toxicity; Locomotor behavior; Rat toxicity; Serum calcium; Serum fluoride; Vitamin D. INTRODUCTION Fluorides are naturally occurring contaminants in the environment.1 Pro- longed ingestion of drinking water containing 1–3 ppm of fluoride ion pro- duces deleterious effects on skeletal, dental,1 and soft tissues,2,3 enzyme ac- tivities,4 and locomotor behavior5 in animals. -
Effects of Fluoride and Other Halogen Ions on the External Stress Corrosion Cracking of Type 304 Austenitic Stainless Steel
NUREG/CR-6539 _ Effects of Fluoride and Other Halogen Ions on the External Stress Corrosion Cracking of Type 304 Austenitic Stainless Steel M low, F. B. Ilutto, Jr. Tutco Scientific Corporation Prepared for U.S. Nuclear Regulatory Commission pfo)D'' ~%, 1 a- ! '% .. lill|Il||# lilllll:[ll[Ill]Ol|Ill E M 72A8A!8 * 7 * CR-6539 R PDR __ . - . .-- I | ! ' AVAILABILITY NOTICE Availabilny of Reference Matenals Cited in NRC Pubhcations Most documents cited in NRC publications will be available from one of the following sources: 1. The NRC Public Document Room, 2120 L Street, NW., Lower Level. Washington, DC 20555-0001 i | 2. The Superintendent of Documents, U.S. Government Pnnting Office, P. O. Box 37082. Washington, DC 20402-9328 l 3. The National Technical information Service Springfield, VA 22161-0002 Although the listing that follows represents the majority of documents cited in NRC publications, it is not in- tended to be exhaustive. Referenced documents available for inspection and copylng for a fee from the NRC Public Document Room include NRC correspondence and internal NRC memoranda; NRC bulletins, circulars, information notices, in- spection and investigation notices; licensee event reports; vendor reports and correspondence; Commissen papers; and applicant and licensee documents and correspondence. The following documents in the NUREG series are aves slo for purchase from the Government Printing Office: formal NRC staff and contractor reports, NRC-sponsored conference proceedings, internatior,al agreement reports, grantee reports, and NRC booklets and brochures. Also available are regulatory guides NRC regula- tions in the Code of Federal Regulations, and Nuclear Regulatory Commission issuances. -
I Need Your Feedback & Ideas!
Greetings Everyone, Included is the Weekly Pile of Information for the week of May 17, 2015, Extension's Equine related educational information & announcements for Rockingham & Guilford Counties. To have something included in the Weekly Pile, please follow these simple guidelines. Information included needs to be educational in nature &/or directly related to Rockingham or Guilford Counties. provided information is a resource to the citizens of Rockingham/Guilford Counties. provided information does not require extra time or effort to be listed. Listings for Swap Shop will not list pricing details. Please Email information to me by Wednesday each Week. Please keep ads or events as short as possible – with NO FORMATTING, NO unnecessary Capitalization’s and NO ATTACHED DOCUMENTS. (If sent in that way, it may not be included) Please include contact information Phone, Email and alike. PLEASE PUT WEEKLY PILE IN SUBJECT LINE when you send into me. The Weekly Pile is not for listings for Commercial type properties or products. If I forgot to include anything in this email it was probably an oversight on my part, but please let me know! If you have a question or ideas that you would like covered in the Weekly Pile, please let me know and I will try to include. As Always, I would like to hear your comments about the Weekly Pile or the Extension Horse Program in Rockingham or Guilford Counties! I NEED YOUR FEEDBACK & IDEAS! Included in The Pile this Week: 1. TICKS, TICKS TICKS Its All About TICKS Program May 27th 7pm 2. Grazing Management 3. -
Ammonium Fluoride Product Stewardship Summary February 2012
Ammonium Fluoride Product Stewardship Summary February 2012 (NH4)F Chemical Name: Ammonium Fluoride Chemical Category (if applicable): Inorganic neutral halide Synonyms: Neutral ammonium fluoride; Commercial ammonium fluoride; and (NH4)F CAS Number: 12125-01-8 CAS Name: Ammonium fluoride EC (EINECS) Number: 235-185-9 Other identifier (Please specify): GPS0050 Honeywell manufactures ammonium fluoride that is used by industry in the manufacture of electronic materials. Exposure can occur at either an ammonium fluoride manufacturing facility or at other manufacturing, packaging or storage facilities that handle ammonium fluoride. Persons involved in maintenance, sampling and testing activities, or in the loading and unloading of packages containing ammonium fluoride are at risk of exposure, but worker exposure can be controlled with the use of proper general mechanical ventilation and personal protective equipment. Workplace exposure limits for fluoride ion have been established for use in worksite safety programs. When ammonium fluoride is a component of consumer products, users should follow manufacturer’s use and/or label instructions. Ammonium fluoride dusts released to the atmosphere and deposited in soil or surface water in the vicinity of production sites have negligible impact on the environment. Please see the MSDS for additional information. Ammonium fluoride is a nonflammable solid that is stable under normal conditions. Ammonium fluoride is corrosive to metals and glass. It can react with acids to liberate hydrogen fluoride and bases to liberate ammonia. When heated to decomposition, it will release toxic hydrogen fluoride gas and ammonia. Contact of ammonium fluoride with water or extended skin contact under moist conditions can produce hydrofluoric acid (HF), a very dangerous acid that can cause burns of the skin and eyes. -
Reaction of Potassium Fluoride with Organic Halogen Compounds. I
Reaction of Potassium Fluoride with Organic Halogen Compounds. I) Reactions of Potassium Fluoride with Organic Halides, Acids, aad Esters in presence ef Dimethyl Formamide and their Pyrolytic Decaboxylation in presence of Potassium Fluoride By You Sun Kim Atomic Energy Research Institute, Korea 有機 할로겐 化合物과 弗化加里의 反應 (第1報) 有機 할라어드, 酸 및 에스테르와 弗化加里의 디메칠 호쁨아마이드 溶蝶系 反應 및 高混■■脫炭酸-熱分解反應 金 裕 *善 (1963. 6. 19 受理) Abstract Reactions between potassium fluride with organic halogen-containning carboxylic acids in dimethyl formamide solvent gave a decarboxylation reaction for the case of fluoro carboxylic acids of the type of CF3 COOH, C3F7COOH, and C2F5COOH, whereas an additional partial fluorination together with dimeri zation reaction occured for the chlorine containning acids of the type of CH2CICOOH, CH3CHCICOOH, CHCI2COOH and o-Cl-CeHi-COOH. The phenyl halides showed no reactivity, but the halides with two electron attracting substituents on the benzene ring gave mainly dimerization reaction. The esters and alcohols gave an usual fluorination reaction. The same reactions in absence of the solvent at the elevated temperature increase the yield of the dimerized product and gave the cyclized product, fluorenone, in case of o-chlorobenzoic acid. It was found that the fluorination usually precede the decarboxylation reaction by checking the stiochemical sequence of reaction. Catalytic influence of potassium fluoride were discussed and the mechanism of the reaction was considered. 耍 約 「디메望호름아마이드」溶媒系에서 有機含할로겐化合物을 弗化加里와 反應시켜 본 結果 CFsCOOH, CsF’COOH, CzFQOOH 와 같은 含弗素有機酸에서는 脫炭酸反應이 일어나며, 含鹽素有機酸, CH2C1COOH. CH3CHC1COOH, CHC12- COOH 및 o-CK사LCOOH 은 一部 弗化反應이 일어 나고 雙合어imerization) 反應이 隨伴된다는 것을 究明하였다. -
ADA Fluoridation Facts 2018
Fluoridation Facts Dedication This 2018 edition of Fluoridation Facts is dedicated to Dr. Ernest Newbrun, respected researcher, esteemed educator, inspiring mentor and tireless advocate for community water fluoridation. About Fluoridation Facts Fluoridation Facts contains answers to frequently asked questions regarding community water fluoridation. A number of these questions are responses to myths and misconceptions advanced by a small faction opposed to water fluoridation. The answers to the questions that appear in Fluoridation Facts are based on generally accepted, peer-reviewed, scientific evidence. They are offered to assist policy makers and the general public in making informed decisions. The answers are supported by over 400 credible scientific articles, as referenced within the document. It is hoped that decision makers will make sound choices based on this body of generally accepted, peer-reviewed science. Acknowledgments This publication was developed by the National Fluoridation Advisory Committee (NFAC) of the American Dental Association (ADA) Council on Advocacy for Access and Prevention (CAAP). NFAC members participating in the development of the publication included Valerie Peckosh, DMD, chair; Robert Crawford, DDS; Jay Kumar, DDS, MPH; Steven Levy, DDS, MPH; E. Angeles Martinez Mier, DDS, MSD, PhD; Howard Pollick, BDS, MPH; Brittany Seymour, DDS, MPH and Leon Stanislav, DDS. Principal CAAP staff contributions to this edition of Fluoridation Facts were made by: Jane S. McGinley, RDH, MBA, Manager, Fluoridation and Preventive Health Activities; Sharon (Sharee) R. Clough, RDH, MS Ed Manager, Preventive Health Activities and Carlos Jones, Coordinator, Action for Dental Health. Other significant staff contributors included Paul O’Connor, Senior Legislative Liaison, Department of State Government Affairs. -
2. Relevance to Public Health
FLUORIDES, HYDROGEN FLUORIDE, AND FLUORINE 15 2. RELEVANCE TO PUBLIC HEALTH 2.1 BACKGROUND AND ENVIRONMENTAL EXPOSURES TO FLUORIDES, HYDROGEN FLUORIDE, AND FLUORINE IN THE UNITED STATES Fluorine is the most electronegative and reactive of all elements; fluoride is the ionic form of fluorine. Fluorine and anhydrous hydrogen fluoride are naturally occurring gases that have a variety of industrial uses including the production of fluorine-containing chemicals, pharmaceuticals, high octane gasoline, and fluorescent light bulbs; aqueous hydrofluoric acid is a liquid used for stainless steel pickling, glass etching, and metal coatings. The general population is typically exposed to very low levels of gaseous fluoride (primarily as hydrogen fluoride); in the United States and Canada, the levels ranged from 0.01 to 1.65 µg/m3. Populations living near industrial sources of hydrogen fluoride, including coal burning facilities, may be exposed to higher levels of hydrogen fluoride in the air. Additionally, vegetables and fruits grown near these sources may contain higher levels of fluoride, particularly from fluoride- containing dust settling on the plants. Fluoride salts, generically referred to as fluorides, are naturally occurring components of rocks and soil. One of the more commonly used fluoride salt is sodium fluoride; its principal use is for the prevention of dental caries. Sodium fluoride and other fluoride compounds, such as fluorosilicic acid and sodium hexafluorisilicate, are used in the fluoridation of public water. Sodium monofluorophosphate and stanneous fluoride are commonly used in dentifrices such as toothpaste. The general population can be exposed to fluoride through the consumption of fluoridated drinking water, food, and dentifrices. -
Current Awareness in Clinical Toxicology Editors: Damian Ballam Msc and Allister Vale MD
Current Awareness in Clinical Toxicology Editors: Damian Ballam MSc and Allister Vale MD October 2016 CONTENTS General Toxicology 5 Metals 31 Management 14 Pesticides 32 Drugs 17 Chemical Warfare 34 Chemical Incidents & 25 Plants 35 Pollution Chemicals 26 Animals 35 CURRENT AWARENESS PAPERS OF THE MONTH The need for ICU admission in intoxicated patients: a prediction model Brandenburg R, Brinkman S, de Keizer NF, Kesecioglu J, Meulenbelt J, de Lange DW. Clin Toxicol 2016; online early: doi: 10.1080/15563650. 2016.1222616: Context Intoxicated patients are frequently admitted from the emergency room to the ICU for observational reasons. The question is whether these admissions are indeed necessary. Objective The aim of this study was to develop a model that predicts the need of ICU treatment (receiving mechanical ventilation and/or vasopressors <24 h of the ICU admission and/or in- hospital mortality). Materials and methods We performed a retrospective cohort study from a national ICU-registry, including 86 Dutch ICUs. We aimed to include only observational admissions and therefore excluded admissions with treatment, at the start of the admission that can only be applied on the ICU (mechanical Current Awareness in Clinical Toxicology is produced monthly for the American Academy of Clinical Toxicology by the Birmingham Unit of the UK National Poisons Information Service, with contributions from the Cardiff, Edinburgh, and Newcastle Units. The NPIS is commissioned by Public Health England 2 ventilation or CPR before admission). First, a generalized linear mixed-effects model with binominal link function and a random intercept per hospital was developed, based on covariates available in the first hour of ICU admission. -
HYDROGEN FLUORIDE Safety Data Sheet
Revision Date 14-May-2015 , Version 1 _________________________________________________________________________________ HYDROGEN FLUORIDE Safety Data Sheet _________________________________________________________________________________ 1. IDENTIFICATION Product identifier Product Name HYDROGEN FLUORIDE Other means of identification Safety data sheet number LIND-P070 UN/ID no. UN1052 Synonyms Hydrofluoric acid, anhydrous Recommended use of the chemical and restrictions on use Recommended Use Industrial and professional use. Uses advised against Consumer use Details of the supplier of the safety data sheet Linde Gas North America LLC - Linde Merchant Production Inc. - Linde LLC 575 Mountain Ave. Murray Hill, NJ 07974 Phone: 908-464-8100 www.lindeus.com Linde Gas Puerto Rico, Inc. Road 869, Km 1.8 Barrio Palmas, Catano, PR 00962 Phone: 787-641-7445 www.pr.lindegas.com Linde Canada Limited 5860 Chedworth Way Mississauga, Ontario L5R 0A2 Phone: 905-501-1700 www.lindecanada.com * May include subsidiaries or affiliate companies/divisions. For additional product information contact your local customer service. Emergency telephone number Company Phone Number 800-232-4726 (Linde National Operations Center, US) 905-501-0802 (Canada) CHEMTREC: 1-800-424-9300 (North America) +1-703-527-3887 (International) 2. HAZARDS IDENTIFICATION _____________________________________________________________________________________________ Page 1 / 11 LIND-P070 HYDROGEN FLUORIDE Revision Date 14-May-2015 _____________________________________________________________________________________________