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CHEMICAL AND PHYSICAL PROPERTIES by NIOSH under 42 CFR Part 84 or other direct. • PbYsieal data reading devices calibrated to measure ethyl benzene I Molecular weight 106 may be used. An analytical method for ethyl benzene is )' 2 Boiling point(760 min Hg) 136 C(277 Fin the N10SH Mansud v Anarl _f yrual�lethadx tad Ed., 3 Specific gravity(water = 1) 0.865 Vol 2. 1977, available from the Government printing Offcx, 4 Vapor density (air = 1 at boiling point of ethyl 00260-6) frsceWashington, D.0 20402 (GPO No. 017-033. benzene) 3 66 S Melting powt —95 C(-139 F) 6 Vapor pressure at 20 C(68 F) 7 1 tram Hg 7- Solubility in water, g/100 g water at 20 C (68 F) RESPIRATORS ' 0.015 8 Evaporation nate (butyl acetate = 1}. LA= than I • Good industrial hygiene practices recommend that • Resetivity engineering controls be used to reduce environmental I Conditions contributing to instability.Heat ennce11ttati0W to the permissible exposure level. How- l. Incompatibilities Contact with strong oxidizing ever' there ars some exceptions where respirators may agents may cause fres and explosions. be sued to control exposure. Respirators may be used 3 Hazardous decomposition products Toxic gases when emgtneersag and work practice controls are not ' and vapors(such as carbon monoxide)may be released echtiicallY fessn'bl% when such controls are is the in a Fire involving ethyl benzene. Process of being i owned,or when they fail and meed to 4 Special precautions:Nome be suppiemen te& Respirators may also be used for ' Flamiaabili nyrnt. 1 S C S9 =dons which require entry into tanks or closed 1 Flash Po ( F)(closed cup) vemels, and in emergency situsuont. If the tate of 2. Autoignition temperature 432 C(8 10 F) respirators is necessary. the only respirators permitted t 3 Flammable limits in au. %by volume:Lower: 1.0; are those that have beenapproved by the Mme Safety Upper 6.7 and Health Admmistratiom (formerly 4 Extingunshant: Dry chemical, foam. Mining Enforce oma` or man mint :ad ' ' m> don) or by the National Imsntute for Occupational Safety and Health. Warning prop • In addition to respirator,selection,a corespna- mplee I. Odor Threshold. According to the Department of Tramportation's CHRIS Hazardow Chemwal Diar4, tOfY Protection Program should be instituted which i.. ethyl benzene has an odor threshold of 140 m- Judea regular ung. namenance, inspection, 2 Eye Irritation Level- According to the AIHA cleaning,and evaluation. �► Hygrenic Grade, "the vapor caused a noticeable eye PERSONAL PROTECTIVE EQUIPMENT irritation In humans at concentrations of 200 ppm.- 3. Evaluation of Warning Properties: Through its • Employees should be odor and irritant effects, ethyl benzene can be detected Provided with and (eight to at a concentration less than twice the we unptrvi°us clothing,gloves,face shields(eight ' sure!stmt Therefore, for the Permissible expo- mmunum), and other appropriate Protective clothing adequate of this guideline. necessary to prevent repeated or prolonged skin contact ethyl benzene a treated as a material with ad warning properties, � with liquid ethyl benzxace. ' Clothing wet with liquid ethyl benzene should be ' MONITORING AND MEASUREMENT placed in closed conuarim for storage unto it can be PROCEDURES discarded or until provision it made for the removal of ethyl benzene from the clothing. If the clothing a to be ' General laundered ar otherwise cleaned to remove the ethyl Measurements to determine employee exposure are best benzene,the perm performing the operation should be taken so that the average eight-hour exposure is based informed of ethyl benzene's hazardous properbm ' on a single eight-hour sample or on two four--hour ' Non-unpetvcous clothing which becomes contami- samples. Several short-time interval avgpbx (up to 30 sated with liquid ethyl benzene should be removed minutes) may also be used to determine the average promptly and not rewrorm until the ethyl benzene is ' exposure level. Air samples should be taken in the removed from the clothing. employees breathing some(air that would most clearly • Any clothing which becomes wet with liquid ethyl represent that inhaled by the employee)- benzene should be removed• Method enmedtately and mat Sampling and analyses shay be performed reworm until the ethyl benzene is removed from the �'colleetioa clothing. of ethyl benzene vapors using adsorption tube with • Employees should be proceed with and required to � subsequent desorption with carbon disulfide and gas use splash-proof safety chromatographic analysis.Also.detector tubes certified goggles where liquid ethyl ben- ' •- zmemay contact the eyes. 2 Easy! menssm s.p�.eisar �m-