# NIOSH Pocket Guide to Chemical Hazards
tert-Butyl chromate | CAS 1189-85-1
[(CH3)3CO]2CrO2 | RTECS GB2900000
Synonyms & Trade Names di-tert-Butyl ester of chromic acid | DOT ID & Guide
Exposure Limits | 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)}] | 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
Personal Protection & Sanitation 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 a high-efficiency particulate filter/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]
See also: INTRODUCTION