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Peroxy Compounds Human Health and Ecological Draft Risk Assessment DP 455445, 455446
Peroxy Compounds Human Health and Ecological Draft Risk Assessment DP 455445, 455446 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON, D.C. 20460 OFFICE OF CHEMICAL SAFETY AND POLLUTION PREVENTION MEMORANDUM Date: March 11, 2020 SUBJECT: Registration Review Draft Risk Assessment for the Peroxy Compounds PC Code: 000595, 063201, 063604, 063607, DP Barcode: 455445, 455446 063209, 128860 Decision No: 558073, 558074 Docket No: EPA-HQ-OPP-2009-0546 Regulatory Action: Registration Review Case No: 6059, 4072, 5081 Risk Assessment Type: DRA CAS No: 7722-84-1, 79-21-0, 33734-57-5, 15630-89-4, 10058-23-8, 70693-62-8 TO: Kendall Ziner, Chemical Review Manager Rick Fehir, Ph.D., Team Lead Rose Kyprianou, Branch Chief Regulatory Management Branch (RMB) II Antimicrobials Division (7510P) Office of Pesticide Programs FROM: Andrew Byro, Ph.D., Chemist Kathryn Korthauer, Biologist Timothy Dole, Industrial Hygienist Deborah Burgin, Ph.D., DABT, Toxicologist Risk Assessment and Science Support Branch Antimicrobials Division (7510P) Office of Pesticide Programs THROUGH: Judy Facey, Ph.D., Human Health Risk Assessment Process Leader MP for JF Diana Hsieh, Ecological Risk Assessment Process Leader MP for DH Timothy Leighton, Senior Science Advisor MP for TL Laura Parsons, Associate Branch Chief Melissa Panger, Ph.D., Branch Chief Risk Assessment and Science Support Branch Antimicrobials Division (7510P) This document provides the draft human health and ecological risk assessment conducted in support of the antimicrobial use sites of the following peroxy compounds: hydrogen peroxide, peracetic acid, peroxyoctanoic acid, and sodium percarbonate. Page 1 of 74 Peroxy Compounds Human Health and Ecological Draft Risk Assessment DP 455445, 455446 Although the peroxymonosulfate compounds were included in the peroxy compounds Final Work Plan (FWP), they will not be included in this risk assessment. -
The Heat of Combustion of Beryllium in Fluorine*
JOURNAL OF RESEARCH of the National Bureau of Standards -A. Physics and Chemistry Vol. 73A, No.3, May- June 1969 The Heat of Combustion of Beryllium in Fluorine* K. L. Churney and G. T. Armstrong Institute for Materials Research, National Bureau of Standards, Washington, D.C. 20234 (February 11, 1969) An expe rimental dete rmination of the e ne rgies of combustion in Auorine of polyte traAuoroethylene film and Q.o wder and of mixtures of beryllium with polytetraAuoroethyle ne gi ves for reacti on ( 1)f).H ~.or= - 1022.22 kJ 111 0 1- 1 (- 244.32 kcal mol - I) wit h a n ove ra ll precision of 0.96 kJ 111 0 1- 1 (0. 23 kcal 111 0 1- 1 ) at the 95 pe rce nt confid ence limit s. The tota l un cert a int y is estimated not to exceed ±3.2 kJ mol- I (±0.8 kcal mol - I). The measureme nts on polytetraflu oroeth yle ne giv e for reaction (2a) and reacti on (2 b) f).H ~. o c =- 10 369. 7 and - 10392.4 Jg- I, respective ly. Overall precisions e xpressed at the 95 pe rcent confide nce Ijmits are 3.3 and 6.0 Jg- I, respective ly. Be(c)+ F,(g) = BeF2(a morphous) (1) C,F.(polym e r powd er) + 2F2(g) = 2CF.(g) (2a) C2F.(polyme r film ) + 2F2 (g) = 2CF.(g) (2b) Be2C and Be metal were observed in a small carbonaceous residue from the co mbustion of the beryll iul11 -polytetraAuoroethylene mixtures. -
The Ins and Outs of Dechlorination
The Ins and Outs of Dechlorination If you plan on using a municipal water supply for chlorine is added to water, it will first react with growing fish you will require a dechlorination step any reducing agents, including any ammonia that in your water treatment process. Most municipal may be present. Hypochlorous acid reacts with water systems use chlorine or chloramine (a com- ammonia to form chloramines as follows: bination of chlorine and ammonia) to render the water safe for human consumption. While rela- HOCL + NH3 _ H2O + NH2Cl (monochloramine) tively harmless to humans in minute amounts, HOCL + NH2Cl _ H2O + NHCl2 (dichloramine) chlorine can be deadly to fish. In order to under- HOCL + NHCl2 _ H2O + NCl3 (trichloramine) BY: CARLA MACQUARRIE stand how to dechlorinate water, there must first AND SEAN WILTON be an understanding of how and why chlorine is The formation of chloramines is also dependent used as a disinfecting agent. on pH and temperature, as well as on the concen- tration of ammonia. With the added presence of Chlorine is water soluble gas (7160 mg/L these chloramines, the available chlorine is at 20°C and 1atm) that hydrolyzes rapidly referred to as combined available chlorine (CAC). to form hypochlorous acid (HOCl). This When these reactions are complete, residual reaction forms the basis for the applica- chlorine will accumulate, either in the form of FAC tion of chlorine as a disinfectant and oxi- or CAC. Total residual chlorine refers to the sum of dant as follows: the free and combined forms of residual chlorine. As a disinfectant, the FAC component is more Cl2 + H20 —> HOCl + H+ + Cl- effective than the CAC – this is because chlo- ramines are considered to have only a moderate The by-product, hypochlorous acid(HOCl) biocidal activity against bacteria and a low bioci- ionizes to produce the hypochlorite (OCl-) dal activity against viruses and cysts. -
Release of Melamine and Formaldehyde from Melamine-Formaldehyde Plastic Kitchenware
molecules Article Release of Melamine and Formaldehyde from Melamine-Formaldehyde Plastic Kitchenware , Ingo Ebner * y , Steffi Haberer, Stefan Sander, Oliver Kappenstein , Andreas Luch and Torsten Bruhn y Department of Chemical and Product Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany; [email protected] (S.H.); [email protected] (S.S.); [email protected] (O.K.); [email protected] (A.L.); [email protected] (T.B.) * Correspondence: [email protected]; Tel.: +49-30-18412-27403 These authors contributed equally to this work. y Academic Editor: Roland Franz Received: 26 June 2020; Accepted: 31 July 2020; Published: 10 August 2020 Abstract: The release of melamine and formaldehyde from kitchenware made of melamine resins is still a matter of great concern. To investigate the migration and release behavior of the monomers from melamine-based food contact materials into food simulants and food stuffs, cooking spoons were tested under so-called hot plate conditions at 100 ◦C. Release conditions using the real hot plate conditions with 3% acetic acid were compared with conditions in a conventional migration oven and with a release to deionized water. Furthermore, the kinetics of the release were studied using Arrhenius plots giving an activation energy for the release of melamine of 120 kJ/mol. Finally, a correlation between quality of the resins, specifically the kind of bridges between the monomers, and the release of melamine, was confirmed by CP/MAS 13C-NMR measurements of the melamine kitchenware. Obviously, the ratio of methylene bridges and dimethylene ether bridges connecting the melamine monomers during the curing process can be directly correlated with the amount of the monomers released into food. -
Hypochlorous Acid Handling
Hypochlorous Acid Handling 1 Identification of Petitioned Substance 2 Chemical Names: Hypochlorous acid, CAS Numbers: 7790-92-3 3 hypochloric(I) acid, chloranol, 4 hydroxidochlorine 10 Other Codes: European Community 11 Number-22757, IUPAC-Hypochlorous acid 5 Other Name: Hydrogen hypochlorite, 6 Chlorine hydroxide List other codes: PubChem CID 24341 7 Trade Names: Bleach, Sodium hypochlorite, InChI Key: QWPPOHNGKGFGJK- 8 Calcium hypochlorite, Sterilox, hypochlorite, UHFFFAOYSA-N 9 NVC-10 UNII: 712K4CDC10 12 Summary of Petitioned Use 13 A petition has been received from a stakeholder requesting that hypochlorous acid (also referred 14 to as electrolyzed water (EW)) be added to the list of synthetic substances allowed for use in 15 organic production and handling (7 CFR §§ 205.600-606). Specifically, the petition concerns the 16 formation of hypochlorous acid at the anode of an electrolysis apparatus designed for its 17 production from a brine solution. This active ingredient is aqueous hypochlorous acid which acts 18 as an oxidizing agent. The petitioner plans use hypochlorous acid as a sanitizer and antimicrobial 19 agent for the production and handling of organic products. The petition also requests to resolve a 20 difference in interpretation of allowed substances for chlorine materials on the National List of 21 Allowed and Prohibited Substances that contain the active ingredient hypochlorous acid (NOP- 22 PM 14-3 Electrolyzed water). 23 The NOP has issued NOP 5026 “Guidance, the use of Chlorine Materials in Organic Production 24 and Handling.” This guidance document clarifies the use of chlorine materials in organic 25 production and handling to align the National List with the November, 1995 NOSB 26 recommendation on chlorine materials which read: 27 “Allowed for disinfecting and sanitizing food contact surfaces. -
The Decomposition Kinetics of Peracetic Acid and Hydrogen Peroxide in Municipal Wastewaters
Disinfection Forum No 10, October 2015 The Decomposition Kinetics of Peracetic Acid and Hydrogen Peroxide in Municipal Wastewaters INTRODUCTION Efficient control of microbial populations in municipal wastewater using peracetic acid (PAA) requires an understanding of the PAA decomposition kinetics. This knowledge is critical to ensure the proper dosing of PAA needed to achieve an adequate concentration within the contact time of the disinfection chamber. In addition, the impact of PAA on the environment, post-discharge into the receiving water body, also is dependent upon the longevity of the PAA in the environment, before decomposing to acetic acid, oxygen and water. As a result, the decomposition kinetics of PAA may have a significant impact on aquatic and environmental toxicity. PAA is not manufactured as a pure compound. The solution exists as an equilibrium mixture of PAA, hydrogen peroxide, acetic acid, and water: ↔ + + Acetic Acid Hydrogen Peroxide Peracetic Acid Water PeroxyChem’s VigorOx® WWT II Wastewater Disinfection Technology contains 15% peracetic acid by weight and 23% hydrogen peroxide as delivered. Although hydrogen peroxide is present in the formulation, peracetic acid is considered to be the active component for disinfection1 in wastewater. There have been several published studies investigating the decomposition kinetics of PAA in different water matrices, including municipal wastewater2-7. Yuan7 states that PAA may be consumed in the following three competitive reactions: 1. Spontaneous decomposition 2 CH3CO3H à 2 CH3CO2H + O2 Eq (1) 2. Hydrolysis CH3CO3H + H2O à CH3CO2H + H2O2 Eq (2) 3. Transition metal catalyzed decomposition + CH3CO3H + M à CH3CO2H + O2 + other products Eq (3) At neutral pH’s, both peracetic acid and hydrogen peroxide can be rapidly consumed by these reactions7 (hydrogen peroxide will decompose to water and oxygen via 2H2O2 à 2H2O + O2). -
Stock Solutions
STOCK SOLUTIONS 5 M NaCl (F.W. 58.44) 500 ml: 146.1 g NaCl ~350 ml H2O Dissolve, then bring up to volume with H2O Sterilize by autoclaving (15 minutes) 1 M Tris, pH 8 (F.W. 121.1) 500 ml: 60.55 g Trizma base ~400 ml H2O Approximately 21.1 ml concentrated HCl (Use pH meter) Bring up to volume with H2O Sterilize by autoclaving (15 minutes) 1 M Tris, pH 7.6 (F.W. 121.1) 500 ml: 60.55 g Trizma base ~400 ml H2O Approximately 28.5 ml concentrated HCl (Use pH meter) Bring up to volume with H2O Sterilize by autoclaving (15 minutes) 1 M MgCl2 (F.W. 203.30) 100 ml: 20.33 g MgCl2 ~70 ml H2O Dissolve, then bring up to volume with H2O Sterilize by autoclaving (15 minutes) 1 M CaCl2 (F.W. 147.02) 100 ml: 14.70 g CaCl2 ~90 ml H2O Dissolve, then bring up to volume with H2O Sterilization not required 1 M MgSO4 (F.W. 246.47) 100 ml: 24.65 g MgSO4 ~75 ml H2O Dissolve, then bring up to volume with H2O Sterilize by autoclaving (15 minutes) 0.1 M MgCl2 (F.W. 203.30) 100 ml: 2.03 g MgCl2 ~95 ml H2O Dissolve, then bring up to volume with H2O Sterilize by autoclaving (15 minutes) 3 M NaOH (F.W. 40.00) 100 ml: 12.0 g NaOH ~80 ml H2O Dissolve, then bring up to volume with H2O Sterilization not required 2 M Sorbitol (F.W. 182.2) 500 ml: 182.2 g Sorbitol ~300 ml H2O Dissolve, then bring up to volume with H2O Sterilization by filtration 5 M Potassium acetate (F.W. -
Peracetic Acid Processing
Peracetic Acid Processing Identification Chemical Name(s): CAS Number: peroxyacetic acid, ethaneperoxic acid 79-21-0 Other Names: Other Codes: per acid, periacetic acid, PAA NIOSH Registry Number: SD8750000 TRI Chemical ID: 000079210 UN/ID Number: UN3105 Summary Recommendation Synthetic / Allowed or Suggested Non-Synthetic: Prohibited: Annotation: Synthetic Allowed (consensus) Allowed only for direct food contact for use in wash water. Allowed as a (consensus) sanitizer on surfaces in contact with organic food. (consensus) From hydrogen peroxide and fermented acetic acid sources only. (Not discussed by processing reviewers--see discussion of source under Crops PAA TAP review.) Characterization Composition: C2H4O3. Peracetic acid is a mixture of acetic acid (CH3COOH) and hydrogen peroxide (H2O2) in an aqueous solution. Acetic acid is the principle component of vinegar. Hydrogen peroxide has been previously recommended by the NOSB for the National List in processing (synthetic, allowed at Austin, 1995). Properties: It is a very strong oxidizing agent and has stronger oxidation potential than chlorine or chlorine dioxide. Liquid, clear, and colorless with no foaming capability. It has a strong pungent acetic acid odor, and the pH is acid (2.8). Specific gravity is 1.114 and weighs 9.28 pounds per gallon. Stable upon transport. How Made: Peracetic acid (PAA) is produced by reacting acetic acid and hydrogen peroxide. The reaction is allowed to continue for up to ten days in order to achieve high yields of product according to the following equation. O O || || CH3-C-OH + H2O2 CH3C-O-OH + H2O acetic acid hydrogen peroxyacetic peroxide acid Due to reaction limitations, PAA generation can be up to 15% with residual levels of hydrogen peroxide (up to 25%) and acetic acid (up to 35%) with water up to 25%. -
CA004600 SDS.Pdf
Safety Data Sheet SECTION 1: Identification 1.1. Product Identifier Trade Name or Designation: Ammonium Bifluoride, 15.5 g/L, Aqueous Product Number: A-0046 Other Identifying Product Numbers: A-0046-4L 1.2. Recommended Use and Restrictions on Use General Laboratory Reagent 1.3. Details of the Supplier of the Safety Data Sheet Company: Reagents Inc. Address: 4746 Sweden Road Charlotte, NC 28224 USA Telephone: 800-732-8484 1.4. Emergency Telephone Number (24 hr) CHEMTREC (USA) 800-424-9300 CHEMTREC (International) 1+ 703-527-3887 SECTION 2: Hazard(s) Identification 2.1. Classification of the Substance or Mixture (in accordance with OSHA HCS 29 CFR 1910.1200) For the full text of the Hazard and Precautionary Statements listed below, see Section 16. Hazard Hazard Class Category Statement Precautionary Statements Skin Corrosion / Irritation Category 1 H314 P260, P264, P280, P301+P330+P331, P303+P361+P353, P363, P304+P340, P310, P321, P305+P351+P338, P405, P501 Eye Damage / Irritation Category 1 H318 P280, P305+P351+P338, P310 Specific Target Organs/Systemic Toxicity Following Single Category 1 H370 P260, P264, P270, P307+P311, P321, P405, Exposure P501 Specific Target Organs/Systemic Toxicity Following Repeated Category 2 H373 P260, P314, P501 Exposure Corrosive to Metals Category 1 H290 P234, P390, P406 Product Number: A-0046 Page 1 of 10 Safety Data Sheet 2.2. GHS Label Elements Pictograms: Signal Word: Danger Hazard Statements: Hazard Number Hazard Statement H290 May be corrosive to metals. H314 Causes severe skin burns and eye damage. H318 Causes serious eye damage. H370 Causes damage to organs. H373 May cause damage to organs through prolonged or repeated exposure. -
NON-HAZARDOUS CHEMICALS May Be Disposed of Via Sanitary Sewer Or Solid Waste
NON-HAZARDOUS CHEMICALS May Be Disposed Of Via Sanitary Sewer or Solid Waste (+)-A-TOCOPHEROL ACID SUCCINATE (+,-)-VERAPAMIL, HYDROCHLORIDE 1-AMINOANTHRAQUINONE 1-AMINO-1-CYCLOHEXANECARBOXYLIC ACID 1-BROMOOCTADECANE 1-CARBOXYNAPHTHALENE 1-DECENE 1-HYDROXYANTHRAQUINONE 1-METHYL-4-PHENYL-1,2,5,6-TETRAHYDROPYRIDINE HYDROCHLORIDE 1-NONENE 1-TETRADECENE 1-THIO-B-D-GLUCOSE 1-TRIDECENE 1-UNDECENE 2-ACETAMIDO-1-AZIDO-1,2-DIDEOXY-B-D-GLYCOPYRANOSE 2-ACETAMIDOACRYLIC ACID 2-AMINO-4-CHLOROBENZOTHIAZOLE 2-AMINO-2-(HYDROXY METHYL)-1,3-PROPONEDIOL 2-AMINOBENZOTHIAZOLE 2-AMINOIMIDAZOLE 2-AMINO-5-METHYLBENZENESULFONIC ACID 2-AMINOPURINE 2-ANILINOETHANOL 2-BUTENE-1,4-DIOL 2-CHLOROBENZYLALCOHOL 2-DEOXYCYTIDINE 5-MONOPHOSPHATE 2-DEOXY-D-GLUCOSE 2-DEOXY-D-RIBOSE 2'-DEOXYURIDINE 2'-DEOXYURIDINE 5'-MONOPHOSPHATE 2-HYDROETHYL ACETATE 2-HYDROXY-4-(METHYLTHIO)BUTYRIC ACID 2-METHYLFLUORENE 2-METHYL-2-THIOPSEUDOUREA SULFATE 2-MORPHOLINOETHANESULFONIC ACID 2-NAPHTHOIC ACID 2-OXYGLUTARIC ACID 2-PHENYLPROPIONIC ACID 2-PYRIDINEALDOXIME METHIODIDE 2-STEP CHEMISTRY STEP 1 PART D 2-STEP CHEMISTRY STEP 2 PART A 2-THIOLHISTIDINE 2-THIOPHENECARBOXYLIC ACID 2-THIOPHENECARBOXYLIC HYDRAZIDE 3-ACETYLINDOLE 3-AMINO-1,2,4-TRIAZINE 3-AMINO-L-TYROSINE DIHYDROCHLORIDE MONOHYDRATE 3-CARBETHOXY-2-PIPERIDONE 3-CHLOROCYCLOBUTANONE SOLUTION 3-CHLORO-2-NITROBENZOIC ACID 3-(DIETHYLAMINO)-7-[[P-(DIMETHYLAMINO)PHENYL]AZO]-5-PHENAZINIUM CHLORIDE 3-HYDROXYTROSINE 1 9/26/2005 NON-HAZARDOUS CHEMICALS May Be Disposed Of Via Sanitary Sewer or Solid Waste 3-HYDROXYTYRAMINE HYDROCHLORIDE 3-METHYL-1-PHENYL-2-PYRAZOLIN-5-ONE -
Ammonium Bifluoride CAS No
Product Safety Summary Ammonium Bifluoride CAS No. 1341-49-7 This Product Safety Summary is intended to provide a general overview of the chemical substance. The information on the summary is basic information and is not intended to provide emergency response information, medical information or treatment information. The summary should not be used to provide in-depth safety and health information. In-depth safety and health information can be found in the Safety Data Sheet (SDS) for the chemical substance. Names • Ammonium bifluoride (ABF) • Ammonium difluoride • Ammonium acid fluoride • Ammonium hydrogen difluoride • Ammonium fluoride compound with hydrogen fluoride (1:1) Product Overview Solvay Fluorides, LLC does not sell ammonium bifluoride directly to consumers. Ammonium bifluoride is used in industrial applications and in other processes where workplace exposures can occur. Ammonium bifluoride (ABF) is used for cleaning and etching of metals before they are further processed. It is used as an oil well acidifier and in the etching of glass or cleaning of brick and ceramics. It may also be used for pH adjustment in industrial textile processing or laundries. ABF is available as a solid or liquid solution (in water). Ammonium bifluoride is a corrosive chemical and contact can severely irritate and burn the skin and eyes causing possible permanent eye damage. Breathing ammonium bifluoride can severely irritate and burn the nose, throat, and lungs, causing nosebleeds, cough, wheezing and shortness of breath. On contact with water or moist skin, ABF can release hydrofluoric acid, a very dangerous acid. Inhalation or ingestion of large amounts of ammonium bifluoride can cause nausea, vomiting and loss of appetite. -
Benzene MSDS
He a lt h 2 3 Fire 3 2 0 Re a c t iv it y 0 Pe rs o n a l Pro t e c t io n H Material Safety Data Sheet Benzene MSDS Section 1: Chemical Product and Company Identification Product Name: Benzene Contact Information: Catalog Codes: SLB1564, SLB3055, SLB2881 Sciencelab.com, Inc. 14025 Smith Rd. CAS#: 71-43-2 Houston, Texas 77396 RTECS: CY1400000 US Sales: 1-800-901-7247 International Sales: 1-281-441-4400 TSCA: TSCA 8(b) inventory: Benzene Order Online: ScienceLab.com CI#: Not available. CHEMTREC (24HR Emergency Telephone), call: Synonym: Benzol; Benzine 1-800-424-9300 Chemical Name: Benzene International CHEMTREC, call: 1-703-527-3887 Chemical Formula: C6-H6 For non-emergency assistance, call: 1-281-441-4400 Section 2: Composition and Information on Ingredients Composition: Name CAS # % by Weight Benzene 71-43-2 100 Toxicological Data on Ingredients: Benzene: ORAL (LD50): Acute: 930 mg/kg [Rat]. 4700 mg/kg [Mouse]. DERMAL (LD50): Acute: >9400 mg/kg [Rabbit]. VAPOR (LC50): Acute: 10000 ppm 7 hours [Rat]. Section 3: Hazards Identification Potential Acute Health Effects: Very hazardous in case of eye contact (irritant), of inhalation. Hazardous in case of skin contact (irritant, permeator), of ingestion. Inflammation of the eye is characterized by redness, watering, and itching. Potential Chronic Health Effects: CARCINOGENIC EFFECTS: Classified A1 (Confirmed for human.) by ACGIH, 1 (Proven for human.) by IARC. MUTAGENIC EFFECTS: Classified POSSIBLE for human. Mutagenic for mammalian somatic cells. Mutagenic for bacteria and/or yeast. TERATOGENIC EFFECTS: Not available. DEVELOPMENTAL TOXICITY: Classified Reproductive system/toxin/female [POSSIBLE].