NIOSH Pocket Guide to Chemical Hazards

tert-Butyl chromate

CAS 1189-85-1


RTECS GB2900000
Synonyms & Trade Names
di-tert-Butyl ester of chromic acid
DOT ID & Guide


NIOSH REL: Ca TWA 0.001 mg Cr(VI)/m3 See Appendix A See Appendix C
OSHA PEL: C 0.1 mg CrO3/m3 [skin] See Appendix C
IDLH Ca [15 mg/m3 {as Cr(VI)}] See: 1189851 Conversion
Physical Description
Liquid. [Note: Solidifies at 32-23°F.]
MW: 230.3
BP: ?
FRZ: 32-23°F
Sol: ?
VP: ?
IP: ?

Sp.Gr: ?
Fl.P: ?
UEL: ?
LEL: ?

Incompatibilities & Reactivities
Reducing agents, moisture, acids, alcohols, hydrazine, combustible materials
Measurement Methods
NIOSH 7604; OSHA ID103, ID215
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
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
Important additional information about respirator selection
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
(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
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system; eye, skin burns; drowsiness, muscle weakness; skin ulcers; lung changes; [potential occupational carcinogen]
Target Organs Eyes, skin, respiratory system, central nervous system

Cancer Site [lung cancer]