Department of National Defence Canadian Armed Forces Chemical Agent Sensors – Area Detection and Identification System
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Transport of Dangerous Goods
ST/SG/AC.10/1/Rev.16 (Vol.I) Recommendations on the TRANSPORT OF DANGEROUS GOODS Model Regulations Volume I Sixteenth revised edition UNITED NATIONS New York and Geneva, 2009 NOTE The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of the Secretariat of the United Nations concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries. ST/SG/AC.10/1/Rev.16 (Vol.I) Copyright © United Nations, 2009 All rights reserved. No part of this publication may, for sales purposes, be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, electrostatic, magnetic tape, mechanical, photocopying or otherwise, without prior permission in writing from the United Nations. UNITED NATIONS Sales No. E.09.VIII.2 ISBN 978-92-1-139136-7 (complete set of two volumes) ISSN 1014-5753 Volumes I and II not to be sold separately FOREWORD The Recommendations on the Transport of Dangerous Goods are addressed to governments and to the international organizations concerned with safety in the transport of dangerous goods. The first version, prepared by the United Nations Economic and Social Council's Committee of Experts on the Transport of Dangerous Goods, was published in 1956 (ST/ECA/43-E/CN.2/170). In response to developments in technology and the changing needs of users, they have been regularly amended and updated at succeeding sessions of the Committee of Experts pursuant to Resolution 645 G (XXIII) of 26 April 1957 of the Economic and Social Council and subsequent resolutions. -
[19] [11] Patent Number: 4518808
Ulllted States Patent [19] [11] Patent Number: 4,518,808 Wang et a1. [45] Date of Patent: May 21, 1985 [54] PREPARATION OF [56] References Cited 2,5-DICHLOROHYDROQUINONE Us. PATENT DOCUMENTS _ 2,151,137 3/1939 Moness .............................. .. 568/765 [75] Inventors: Richard H. S. Wang; Garry L. Myers, 2,777,002 1/1957 Sullivan . 1 . .. 568/779 both of Kingsport, Tenn. 2,902,518 9/1959 Hurdis et a1. .... .. .. 568/726 X FOREIGN PATENT DOCUMENTS [73] Asslgnee: Eastman Kodak Company’ 839972 6/1960 United Kingdom .............. .. 568/779 Rochester, NY. Primary Examiner—Bernard Hel?n Attorney, Agent, or Firm—Clyde L. Tootle; J. Frederick [21] Appl. No; 537,227 Thomsen [57] ABSTRACT . _ 7 [22] Flled' Sep' "9’ 1983 Disclosed is a process for the preparation of certain dichloro-hydroxy and alkoxy aromatic compounds by [51] Int. Cl.3 ............................................ .. C07C 37/62 reacting the corresponding unchlorinated compound [52] US. Cl. .................................. .. 568/765; 568/633; with sulfuryl chloride in the presence of acetic acid, 568/634; 568/656; 568/726; 568/737; 568/779 propionic acid or lower alkyl esters thereof. [58] Field of Search ............. .. 568/779, 656, 726, 737, 568/765, 649 1 Claim, N0 Drawings 4,518,808 - 1 2 methyl and methoxy being the most common. The aryl PREPARATION OF substituent may be phenyl or alkyl-substituted phenyl. 2,5-DICHLOROHYDROQUINONE The chlorination temperatures used may be varied widely, e.g. from about 15° to 110° C., depending on the DESCRIPTION particular compound being chlorinated. The chlorina This invention relates to a novel process for the prep~ tion promoting temperature preferably is in the range of aration of dichloro-hydroxy and alkoxy aromatic com about 30° to 80° C. -
Downloads/DL Praevention/Fachwissen/Gefahrstoffe/TOXIKOLOGI SCHE BEWERTUNGEN/Bewertungen/Toxbew072-L.Pdf
Distribution Agreement In presenting this thesis or dissertation as a partial fulfillment of the requirements for an advanced degree from Emory University, I hereby grant to Emory University and its agents the non-exclusive license to archive, make accessible, and display my thesis or dissertation in whole or in part in all forms of media, now or hereafter known, including display on the world wide web. I understand that I may select some access restrictions as part of the online submission of this thesis or dissertation. I retain all ownership rights to the copyright of the thesis or dissertation. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation. Signature: _____________________________ ______________ Jedidiah Samuel Snyder Date Statistical analysis of concentration-time extrapolation factors for acute inhalation exposures to hazardous substances By Jedidiah S. Snyder Master of Public Health Global Environmental Health _________________________________________ P. Barry Ryan, Ph.D. Committee Chair _________________________________________ Eugene Demchuk, Ph.D. Committee Member _________________________________________ Paige Tolbert, Ph.D. Committee Member Statistical analysis of concentration-time extrapolation factors for acute inhalation exposures to hazardous substances By Jedidiah S. Snyder Bachelor of Science in Engineering, B.S.E. The University of Iowa 2010 Thesis Committee Chair: P. Barry Ryan, Ph.D. An abstract of A thesis submitted to the Faculty of the Rollins School of Public Health of Emory University in partial fulfillment of the requirements for the degree of Master of Public Health in Global Environmental Health 2015 Abstract Statistical analysis of concentration-time extrapolation factors for acute inhalation exposures to hazardous substances By Jedidiah S. -
SAPRC07T Mechanism Species Definition Molecular Weight ACETONE Acetone 58.08 ACETYLENE Acetylene 26.04 ACROLEIN Acrolein 56.06 A
SAPRC07T Mechanism Species Molecular Species Definition weight ACETONE Acetone 58.08 ACETYLENE Acetylene 26.04 ACROLEIN Acrolein 56.06 ACROLEIN_PRIMARY Acrolein emissions tracer 56.06 Lumped photoreactive monounsaturated dicarbonyl aromatic AFG1 fragmentation products that photolyze to form radicals 98.10 Lumped photoreactive monounsaturated dicarbonyl aromatic fragmentation products that photolyze to form non-radical AFG2 products 98.10 Lumped diunsaturatred dicarbonyl aromatic fragmentation AFG3 product. 124.14 Alkanes and other non-aromatic compounds that react only with OH, and have kOH between 2 and 5 x 102 ppm-1 min-1. ALK1 (Primarily ethane) 30.07 Alkanes and other non-aromatic compounds that react only with OH, and have kOH between 5 x 102 and 2.5 x 103 ppm-1 ALK2 min-1. (Primarily propane and acetylene) 36.73 Alkanes and other non-aromatic compounds that react only with OH, and have kOH between 2.5 x 103 and 5 x 103 ppm-1 ALK3 min-1. 58.61 Alkanes and other non-aromatic compounds that react only with OH, and have kOH between 5 x 103 and 1 x 104 ppm-1 ALK4 min-1. 77.6 Alkanes and other non-aromatic compounds that react only ALK5 with OH, and have kOH greater than 1 x 104 ppm-1 min-1. 118.89 SAPRC07T Mechanism Species Molecular Species Definition weight SOA precursor compounds products from largest alkanes ALK5RXN (ALK5) 118.9 APIN -pinene 136.23 ARO1 Aromatics with kOH < 2x104 ppm-1 min-1. 95.16 ARO2 Aromatics with kOH > 2x104 ppm-1 min-1. 118.72 BACL Biacetyl 86.09 BALD Aromatic aldehydes (e.g., benzaldehyde) 106.13 BENZENE Benzene 78.11 SOA precursor compounds from benzene via peroxy radical BNZHRXN reaction with HO2 127 SOA precursor compounds from benzene via peroxy radical BNZNRXN reaction with NO 127 BNZRO2 SOA precursor surrogate from benzene 127 BUTADIENE13 1,3-butadiene 54.09 BZCO3 Peroxyacyl radical formed from Aromatic Aldehydes 137.11 BZO Phenoxy Radicals 93 CCHO Acetaldehyde 44.05 CCHO_PRIMARY Acetaldehyde Emissions Tracer 44.05 CCOOH Acetic Acid. -
Material Safety Data Sheet Scction I -IDENTIFICATION
CREAf IN6 TO ORROW Material Safety Data Sheet Scction I -IDENTIFICATION Product Name: LITHIUM SULFURYL CHLORIDE CELLS AND BATTERIES (all hermetically sealed Electrochem CSC/PMX cells) Manufacturer: Electrochem Solutions (Subsidiary of Greatbatch, lnc) 670 Paramount Drive Raynham, MA 02767 USA Telephone: 781-830-5800 Fax: 781-575-1545 Transportation Emergency Number -CHEMTREC 1-800424-9300 Revision Date -2-1 5-201 3 Section 2 - COMPOSITION/INFORMATION ON INGREDIENTS Hazardous Components: 1 ) Lithium- CAS#7439-93-2: TLV/PEL: None est. 2) Sulfuryl Chloride -CAS#7791 -25-5 TLV/PEL: None established 3) Chlorine (Cl2) -CAS# 7782-50-5 ACGIH: 0.5m9/m3 TWA/1ppm STEL 4) Carbon CAS# 1333-86-4 ACGIH: 3.5 mg/m3 TWA For cell lithium content, refer to technical datasheet information. Scction 3-HAZARDS IDENTIFICATION DANGER - lnternal contents are extremely hazardous. Leaking fluid is corrosive and dangerous upon inhalation. Battery may be explosive at higher temperatures. Do not expose to temperatures above the maximum rated temperature as specified by the manufacturer due to potential leak hazard. lf batterv leaks or vents: Primary Routes of Entry: Inhalation or skin contact Carcinogenicity: Not listed by NTP, IARC, or regulated by OSHA Health Hazards: Acute -Vapors are very irritating to skin, eyes, and mucous membranes. lnhalation of sulfuryl chloride or thionyl chloride vapors can result in pulmonary edema. Chronic - Overexposure can cause symptoms of non-fibrotic lung injury. Signs and symtoms of exposure : Eye and mucous membrane irritation. Medical conditions generally aggravated by exposure: Asthma, or other respiratory conditions, skin allergies, and eczema. MSDS-OOO3 Rev. B ECO# I 1598 Page 1 (/atltlrvc toinoRpow Scction 4 -FIRST AID MEASURES Eye Contact: Flush with running water for at least 15 minutes while holding eyelids apart. -
Assessment of Portable HAZMAT Sensors for First Responders
The author(s) shown below used Federal funds provided by the U.S. Department of Justice and prepared the following final report: Document Title: Assessment of Portable HAZMAT Sensors for First Responders Author(s): Chad Huffman, Ph.D., Lars Ericson, Ph.D. Document No.: 246708 Date Received: May 2014 Award Number: 2010-IJ-CX-K024 This report has not been published by the U.S. Department of Justice. To provide better customer service, NCJRS has made this Federally- funded grant report available electronically. Opinions or points of view expressed are those of the author(s) and do not necessarily reflect the official position or policies of the U.S. Department of Justice. Assessment of Portable HAZMAT Sensors for First Responders DOJ Office of Justice Programs National Institute of Justice Sensor, Surveillance, and Biometric Technologies (SSBT) Center of Excellence (CoE) March 1, 2012 Submitted by ManTech Advanced Systems International 1000 Technology Drive, Suite 3310 Fairmont, West Virginia 26554 Telephone: (304) 368-4120 Fax: (304) 366-8096 Dr. Chad Huffman, Senior Scientist Dr. Lars Ericson, Director UNCLASSIFIED This project was supported by Award No. 2010-IJ-CX-K024, awarded by the National Institute of Justice, Office of Justice Programs, U.S. Department of Justice. The opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect those of the Department of Justice. This document is a research report submitted to the U.S. Department of Justice. This report has not been published by the Department. Opinions or points of view expressed are those of the author(s) and do not necessarily reflect the official position or policies of the U.S. -
Xyfluor Chemical Compatibility Guide
456456 Xyfluor® Chemical Compatibility Xyfluor® is a proprietary, highly fluorinated elastomer. The oxygen in the polymer backbone provides outstanding low-temperature capabilities - far better than FKM or FFKM elastomers. The polymer provides improved resistance to many harsh chemicals that can attack the hydrogen in FKM elastomers. The chemical resistance of Xyfluor® approaches but is not equivalent to FFKM elastomers. A = Swell < 10% after exposure. Suitable. B = Swell > 10% & < 20% after exposure. Generally suitable. C = Swell >20% & < 40% after exposure. May be suitable in some situations. D = Swell > 40% after exposure. Not suitable. N = Insufficient data. Test: Full immersion, Room Temperature, 3 days The information contained herein is believed to be reliable, but no representation, guarantees or warranties of any kind are made to its accuracy or suitability for any purpose. Full-scale testing and end-product performance are the responsibility of the user. CHEMICAL RATING CHEMICAL RATING acetaldehyde A amomnium phosphate A acetic acid, ammonium stearate A glacial A ammonium sulfate A hot A ammonium thiocyanate A 5% A amyl acetate A/B acetic anhydride A amyl alcohol A acetone A amyl nitrate A acetone cyanohydrin A aniline A acetyl chloride A aniline hydrochloride A acetylene gas A anti-freeze, alcohol or glycol based A acrylonitrile A aqua regia N adipic acid A argon gas A alcohol, denatured A arsenic acid A alkyl benzene A ash slurry A alkyl-arylsulphonic acid A asphalt A alumina trihydrate N barium chloride A aluminum acetate -
Chemical Name Federal P Code CAS Registry Number Acutely
Acutely / Extremely Hazardous Waste List Federal P CAS Registry Acutely / Extremely Chemical Name Code Number Hazardous 4,7-Methano-1H-indene, 1,4,5,6,7,8,8-heptachloro-3a,4,7,7a-tetrahydro- P059 76-44-8 Acutely Hazardous 6,9-Methano-2,4,3-benzodioxathiepin, 6,7,8,9,10,10- hexachloro-1,5,5a,6,9,9a-hexahydro-, 3-oxide P050 115-29-7 Acutely Hazardous Methanimidamide, N,N-dimethyl-N'-[2-methyl-4-[[(methylamino)carbonyl]oxy]phenyl]- P197 17702-57-7 Acutely Hazardous 1-(o-Chlorophenyl)thiourea P026 5344-82-1 Acutely Hazardous 1-(o-Chlorophenyl)thiourea 5344-82-1 Extremely Hazardous 1,1,1-Trichloro-2, -bis(p-methoxyphenyl)ethane Extremely Hazardous 1,1a,2,2,3,3a,4,5,5,5a,5b,6-Dodecachlorooctahydro-1,3,4-metheno-1H-cyclobuta (cd) pentalene, Dechlorane Extremely Hazardous 1,1a,3,3a,4,5,5,5a,5b,6-Decachloro--octahydro-1,2,4-metheno-2H-cyclobuta (cd) pentalen-2- one, chlorecone Extremely Hazardous 1,1-Dimethylhydrazine 57-14-7 Extremely Hazardous 1,2,3,4,10,10-Hexachloro-6,7-epoxy-1,4,4,4a,5,6,7,8,8a-octahydro-1,4-endo-endo-5,8- dimethanonaph-thalene Extremely Hazardous 1,2,3-Propanetriol, trinitrate P081 55-63-0 Acutely Hazardous 1,2,3-Propanetriol, trinitrate 55-63-0 Extremely Hazardous 1,2,4,5,6,7,8,8-Octachloro-4,7-methano-3a,4,7,7a-tetra- hydro- indane Extremely Hazardous 1,2-Benzenediol, 4-[1-hydroxy-2-(methylamino)ethyl]- 51-43-4 Extremely Hazardous 1,2-Benzenediol, 4-[1-hydroxy-2-(methylamino)ethyl]-, P042 51-43-4 Acutely Hazardous 1,2-Dibromo-3-chloropropane 96-12-8 Extremely Hazardous 1,2-Propylenimine P067 75-55-8 Acutely Hazardous 1,2-Propylenimine 75-55-8 Extremely Hazardous 1,3,4,5,6,7,8,8-Octachloro-1,3,3a,4,7,7a-hexahydro-4,7-methanoisobenzofuran Extremely Hazardous 1,3-Dithiolane-2-carboxaldehyde, 2,4-dimethyl-, O- [(methylamino)-carbonyl]oxime 26419-73-8 Extremely Hazardous 1,3-Dithiolane-2-carboxaldehyde, 2,4-dimethyl-, O- [(methylamino)-carbonyl]oxime. -
1/2 Toxic Compound Data Sheet Name: Indene CAS Number: 00095
1/2 Toxic Compound Data Sheet Name: Indene CAS Number: 00095-13-6 Justification: This compound is listed in Ohio Administrative Code 3745 - 114 - 01 because it fulfills one or more of the following criteria: substances that are known to be, or may reasonably be anticipated to be, carcinogenic, mutagenic, teratogenic, or neurotoxic, causes reproductive dysfunction, is acutely or chronically toxic, or causes the threat of adverse environmental effects through ambient concentrations, bioaccumulation, or atmospheric deposition. lndene is acutely toxic with effects on the upper respiratory system (mucous membranes), pulmonary irritation, liver and kidney effects. Molecular Weight (g/mol): 116.15 Synonyms: Indonaphthene U.S. EPA Carcinogenic Classification (IRIS): Not listed on IRIS. PBT: Not listed as persistent, bioaccumulative and toxic. NTP: Not listed by the National Toxicology Program. HAP: Not listed as a hazardous air pollutant (HAP) by U.S. EPA. 112r: Not listed under Section 112(r) of the Clean Air Act. ACGIH: TLV: 10 ppm or 47,505 µg/m3. Critical effects include upper respiratory irritation or damage, pulmonary irritation, and liver and kidney effects. HSDB: Listed in the Hazardous Substances Data Bank. Inhalation of indene vapors is expected to cause irritation of mucous membranes. International IARC: Not listed by International Agency for Research on Cancer (IARC). ATSDR (MRL): Not listed by ATSDR. DataSheet Indene.wpd 2/2 Reference Material 1. American Conference of Governmental Industrial Hygienists (ACGIH) 2006. TLVs and BEIs: -
Material Safety Data Sheet
Material Safety Data Sheet Sulfuryl chloride fluoride, distilled, 99% ACC# 88306 Section 1 - Chemical Product and Company Identification MSDS Name: Sulfuryl chloride fluoride, distilled, 99% Catalog Numbers: AC176260000, AC176260100, AC176260250 Synonyms: Chloro fluoro sulfone; Chlorosulfonyl fluoride; Fluorosulfonyl chloride; Sulfonyl chloride fluoride; Sulfuryl chlorofluoride; Sulfuryl fluorochloride Company Identification: Acros Organics N.V. One Reagent Lane Fair Lawn, NJ 07410 For information in North America, call: 800-ACROS-01 For emergencies in the US, call CHEMTREC: 800-424-9300 Section 2 - Composition, Information on Ingredients CAS# Chemical Name Percent EINECS/ELINCS 13637-84-8 Sulfuryl chloride fluoride, distilled 99 237-126-2 Section 3 - Hazards Identification EMERGENCY OVERVIEW Appearance: clear, colorless clear liquid. Danger! Corrosive. Causes eye and skin burns. May cause severe respiratory tract irritation with possible burns. May cause severe digestive tract irritation with possible burns. Moisture sensitive. Target Organs: No data found. Potential Health Effects Eye: Causes eye burns. May cause chemical conjunctivitis and corneal damage. Skin: Causes skin burns. May cause skin rash (in milder cases), and cold and clammy skin with cyanosis or pale color. Ingestion: May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns. May cause perforation of the digestive tract. May cause systemic effects. Inhalation: Causes chemical burns to the respiratory tract. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. May cause systemic effects. May cause burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting. Chronic: Effects may be delayed. Section 4 - First Aid Measures Eyes: Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. -
Acutely / Extremely Hazardous Waste List
Acutely / Extremely Hazardous Waste List Federal P CAS Registry Acutely / Extremely Chemical Name Code Number Hazardous 4,7-Methano-1H-indene, 1,4,5,6,7,8,8-heptachloro-3a,4,7,7a-tetrahydro- P059 76-44-8 Acutely Hazardous 6,9-Methano-2,4,3-benzodioxathiepin, 6,7,8,9,10,10- hexachloro-1,5,5a,6,9,9a-hexahydro-, 3-oxide P050 115-29-7 Acutely Hazardous Methanimidamide, N,N-dimethyl-N'-[2-methyl-4-[[(methylamino)carbonyl]oxy]phenyl]- P197 17702-57-7 Acutely Hazardous 1-(o-Chlorophenyl)thiourea P026 5344-82-1 Acutely Hazardous 1-(o-Chlorophenyl)thiourea 5344-82-1 Extemely Hazardous 1,1,1-Trichloro-2, -bis(p-methoxyphenyl)ethane Extemely Hazardous 1,1a,2,2,3,3a,4,5,5,5a,5b,6-Dodecachlorooctahydro-1,3,4-metheno-1H-cyclobuta (cd) pentalene, Dechlorane Extemely Hazardous 1,1a,3,3a,4,5,5,5a,5b,6-Decachloro--octahydro-1,2,4-metheno-2H-cyclobuta (cd) pentalen-2- one, chlorecone Extemely Hazardous 1,1-Dimethylhydrazine 57-14-7 Extemely Hazardous 1,2,3,4,10,10-Hexachloro-6,7-epoxy-1,4,4,4a,5,6,7,8,8a-octahydro-1,4-endo-endo-5,8- dimethanonaph-thalene Extemely Hazardous 1,2,3-Propanetriol, trinitrate P081 55-63-0 Acutely Hazardous 1,2,3-Propanetriol, trinitrate 55-63-0 Extemely Hazardous 1,2,4,5,6,7,8,8-Octachloro-4,7-methano-3a,4,7,7a-tetra- hydro- indane Extemely Hazardous 1,2-Benzenediol, 4-[1-hydroxy-2-(methylamino)ethyl]- 51-43-4 Extemely Hazardous 1,2-Benzenediol, 4-[1-hydroxy-2-(methylamino)ethyl]-, P042 51-43-4 Acutely Hazardous 1,2-Dibromo-3-chloropropane 96-12-8 Extemely Hazardous 1,2-Propylenimine P067 75-55-8 Acutely Hazardous 1,2-Propylenimine 75-55-8 Extemely Hazardous 1,3,4,5,6,7,8,8-Octachloro-1,3,3a,4,7,7a-hexahydro-4,7-methanoisobenzofuran Extemely Hazardous 1,3-Dithiolane-2-carboxaldehyde, 2,4-dimethyl-, O- [(methylamino)-carbonyl]oxime 26419-73-8 Extemely Hazardous 1,3-Dithiolane-2-carboxaldehyde, 2,4-dimethyl-, O- [(methylamino)-carbonyl]oxime. -
Selenium Hexafluoride INTERIM 1: 11-2007 1 2 3 INTERIM ACUTE EXPOSURE GUIDELINE LEVELS (Aegls) 5 for 6 Selenium Hexafluoride 7 (CAS Reg
Selenium Hexafluoride INTERIM 1: 11-2007 1 2 3 INTERIM ACUTE EXPOSURE GUIDELINE LEVELS (AEGLs) 5 FOR 6 Selenium Hexafluoride 7 (CAS Reg. No. 7783-79-1) 8 9 Se-F6 10 11 12 13 14 15 16 17 18 19 20 21 22 Selenium Hexafluoride INTERIM 1: 11-2007 1 INTERIM ACUTE EXPOSURE GUIDELINE LEVELS (AEGLs) 3 FOR 4 SELENIUM HEXAFLUORIDE 5 (CAS Reg. No. 7783-79-1) 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 4 Selenium Hexafluoride INTERIM 1: 11-2007 1 2 3 4 5 PREFACE 6 7 Under the authority of the Federal Advisory Committee Act (FACA) P. L. 92-463 of 8 1972, the National Advisory Committee for Acute Exposure Guideline Levels for Hazardous 9 Substances (NAC/AEGL Committee) has been established to identify, review and interpret 10 relevant toxicologic and other scientific data and develop AEGLs for high priority, acutely toxic 11 chemicals. 12 13 AEGLs represent threshold exposure limits for the general public and are applicable to 14 emergency exposure periods ranging from 10 minutes to 8 hours. Three levels C AEGL-1, 15 AEGL-2 and AEGL-3 C are developed for each of five exposure periods (10 and 30 minutes, 1 16 hour, 4 hours, and 8 hours) and are distinguished by varying degrees of severity of toxic effects. 17 The three AEGLs are defined as follows: 18 19 AEGL-1 is the airborne concentration (expressed as parts per million or milligrams per 20 cubic meter [ppm or mg/m3]) of a substance above which it is predicted that the general 21 population, including susceptible individuals, could experience notable discomfort, irritation, or 22 certain asymptomatic, non-sensory effects.