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Trimethyl phosphite

Synonyms & Trade Names
Methyl phosphite, Trimethoxyphosphine, Trimethyl ester of phosphorous acid
CAS No.
121-45-9
RTECS No.
TH1400000
DOT ID & Guide
2329 130
Formula
(CH3O)3P
Conversion
1 ppm = 5.08 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
: TWA 2 ppm (10 mg/m3)
OSHA PEL
†: none
Measurement Methods

None available
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a distinctive, pungent odor.
MW:
124.1
BP:
232°F
FRZ:
-108°F
Sol:
Reacts		 VP(77°F): 24 mmHg
IP:
?
Sp.Gr:
1.05
Fl.P:
82°F
UEL:
?
LEL:
?
Class IC Flammable Liquid: Fl.P. at or above 73°F and below 100°F.
Incompatibilities & Reactivities
Magnesium perchlorate, water [Note: Reacts (hydrolyzes) with water.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, upper respiratory system; dermatitis; in animals: teratogenic effects
Target Organs
Eyes, skin, respiratory system, reproductive system
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: Quick drench
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 1556
 

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