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Dibutyl phosphate

Synonyms & Trade Names
Dibutyl acid o-phosphate, Di-n-butyl hydrogen phosphate, Dibutyl phosphoric acid
CAS No.
107-66-4
RTECS No.
TB9605000
DOT ID & Guide
Formula
(C4H9O)2(OH)PO
Conversion
1 ppm = 8.60 mg/m3
IDLH
30 ppm
See: 107664
Exposure Limits
NIOSH REL
TWA 1 ppm (5 mg/m3) ST 2 ppm (10 mg/m3)
OSHA PEL
TWA 1 ppm (5 mg/m3) See Appendix G
Measurement Methods
NIOSH 5017
See: NMAM or OSHA Methods
Physical Description
Pale-amber, odorless liquid.
Molecular Weight
210.2
Boiling Point
212°F (Decomposes)
Freezing Point
?
Solubility
Insoluble
Vapor Pressure
1 mmHg (approx)
Ionization Potential
?
Specific Gravity
1.06
Flash Point
?
Upper Exposive Limit
?
Lower Explosive Limit
?
Combustible Liquid
Incompatibilities & Reactivities
Strong oxidizers
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, respiratory system; headache
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:No recommendation
Provide:Quick drench
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash promptly
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 10 ppm:
(APF = 10) Any supplied-air respirator

Up to 25 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode

Up to 30 ppm:
(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Emergency or planned entry into unknown concentrations or IDLH conditions:
(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: 1278   MEDICAL TESTS: 0070
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