Trimethyl phosphite
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CAS
121-45-9
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(CH3O)3P
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RTECS
TH1400000
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Synonyms & Trade Names
Methyl phosphite, Trimethoxyphosphine, Trimethyl ester of phosphorous acid
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DOT ID & Guide
2329 / 129
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Exposure
Limits
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NIOSH REL: TWA 2 ppm (10 mg/m3)
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OSHA PEL†: none
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IDLH
N.D.
See: IDLH INDEX
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Conversion
1 ppm = 5.08 mg/m3
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Physical Description
Colorless liquid with a distinctive, pungent odor.
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MW: 124.1
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BP: 232°F
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FRZ: -108°F
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Sol: Reacts
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VP(77°F): 24 mmHg
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IP: ?
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Sp.Gr: 1.05
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Fl.P: 82°F
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UEL: ?
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LEL: ?
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Class IC Flammable Liquid: Fl.P. at or above 73°F and below 100°F.
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Incompatibilities & Reactivities
Magnesium perchlorate, water [Note: Reacts (hydrolyzes) with water.]
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Measurement Methods
None available
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation
Provide: Quick drench
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
Not available.
Important additional information about respirator selection
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Exposure Routes
inhalation, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, skin, upper respiratory system; dermatitis; in animals: teratogenic effects
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Target Organs
Eyes, skin, respiratory system, reproductive system
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