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Benzene

Synonyms & Trade Names
Benzol, Phenyl hydride
CAS No.
71-43-2
RTECS No.
CY1400000
DOT ID & Guide
1114 130
Formula
C6H6
Conversion
1 ppm = 3.19 mg/m3
IDLH
Ca [500 ppm]
See: 71432
Exposure Limits
NIOSH REL
: Ca TWA 0.1 ppm ST 1 ppm See Appendix A
OSHA PEL
: [1910.1028] TWA 1 ppm ST 5 ppm See Appendix F
Measurement Methods

NIOSH 1500 , 1501 , 3700 , 3800;
OSHA 12 , 1005
See: NMAM or OSHA Methods
Physical Description
Colorless to light-yellow liquid with an aromatic odor. [Note: A solid below 42°F.]
MW:
78.1
BP:
176°F
FRZ:
42°F
Sol:
0.07%
VP:
75 mmHg
IP:
9.24 eV
Sp.Gr:
0.88
Fl.P:
12°F
UEL:
7.8%
LEL:
1.2%
Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.
Incompatibilities & Reactivities
Strong oxidizers, many fluorides & perchlorates, nitric acid
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, nose, respiratory system; dizziness; headache, nausea, staggered gait; anorexia, lassitude (weakness, exhaustion); dermatitis; bone marrow depression; [potential occupational carcinogen]
Target Organs
Eyes, skin, respiratory system, blood, central nervous system, bone marrow
Cancer Site
[leukemia]
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
Provide: Eyewash, Quick drench
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations

(See Appendix E)

NIOSH

At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0015   See MEDICAL TESTS: 0022
 
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