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tert-Butyl chromate

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Synonyms & Trade Names
di-tert-Butyl ester of chromic acid
CAS No.
1189-85-1
RTECS No.
GB2900000
DOT ID & Guide
Formula
[(CH₃)₃CO]₂CrO₂
Conversion
IDLH
Ca [15 mg/m3 {as Cr(VI)}]
See: 1189851
Exposure Limits
NIOSH REL
Ca TWA 0.001 mg Cr(VI)/m3 See Appendix A See Appendix C
OSHA PEL
TWA 0.005 mg CrO3/m3 [skin] See Appendix C
Measurement Methods
NIOSH 7604;
OSHA ID103 , ID215
See: NMAM or OSHA Methods
Physical Description
Liquid. [Note: Solidifies at 32-23°F.]
Molecular Weight
230.3
Boiling Point
?
Freezing Point
32-23°F
Solubility
?
Vapor Pressure
?
Ionization Potential
?
Specific Gravity
?
Flash Point
?
Upper Explosive Limit
?
Lower Explosive Limit
?
Incompatibilities & Reactivities
Reducing agents, moisture, acids, alcohols, hydrazine, combustible materials
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, respiratory system; eye, skin burns; drowsiness, muscle weak; skin ulcers; lung changes; [potential occupational carcinogen]
Target Organs
Eyes, skin, respiratory system, central nervous system
Cancer Site
[lung cancer]
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated/Daily
Remove:When wet or contaminated
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

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 having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1533   MEDICAL TESTS: 0031
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health