| Identification | More | [Name]
Trimethyl phosphite | [CAS]
121-45-9 | [Synonyms]
AURORA KA-1230
METHYL PHOSPHITE
PHOSPHOROUS ACID TRIMETHYL ESTER
TRIMETHYL PHOSPHITE
TRIMETHYL PHOSPHONATE
fosforyntrojmetylowy
Methyl phosphite ((MeO)3P)
P(OCH3)3
Phosphonousacidtrimethylester
Trimethoxyfosfin
Trimethoxyphosphine
Trimethyl ester of phosphorous acid
Trimethylfosfit
Trimethylphosphit
TRIMETHYL PHOSPHITE, 99.999+%
TRIMETHYL PHOSPHITE, 99+%
TRIMETHYL PHOSPHITE, 99+%, NMR GRADE
TrimethyPhosphite
Trimethylphosphite,97%
Phosphorigsuretrimethylester | [EINECS(EC#)]
204-471-5 | [Molecular Formula]
C3H9O3P | [MDL Number]
MFCD00008350 | [Molecular Weight]
124.08 | [MOL File]
121-45-9.mol |
| Chemical Properties | Back Directory | [Appearance]
Trimethyl phosphite is a colorless liquid.
Distinctive pungent, pyridine-like odor. The Odor
Threshold is 0.0001 ppm. | [Melting point ]
−78 °C(lit.) | [Boiling point ]
111-112 °C(lit.) | [density ]
1.052 g/mL at 25 °C(lit.)
| [vapor density ]
4.3 (vs air)
| [vapor pressure ]
17 mm Hg ( 20 °C)
| [refractive index ]
n20/D 1.408(lit.)
| [Fp ]
82 °F
| [storage temp. ]
2-8°C
| [form ]
Liquid | [color ]
Colorless | [Specific Gravity]
1.052 | [explosive limit]
5.2-61.2%(V) | [Water Solubility ]
Hydrolyzes with water. | [Hydrolytic Sensitivity]
4: no reaction with water under neutral conditions | [Sensitive ]
Air & Moisture Sensitive | [BRN ]
956570 | [Exposure limits]
TLV-TWA 10 mg/m3 (2 ppm) (ACGIH). | [Uses]
Chemical intermediate, especially for insecticides. | [CAS DataBase Reference]
121-45-9(CAS DataBase Reference) | [NIST Chemistry Reference]
Phosphorous acid, trimethyl ester(121-45-9) | [EPA Substance Registry System]
121-45-9(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn | [Risk Statements ]
R10:Flammable.
R22:Harmful if swallowed.
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . | [RIDADR ]
UN 2329 3/PG 3
| [WGK Germany ]
1
| [RTECS ]
TH1400000
| [F ]
10-13-21 | [Autoignition Temperature]
250 °C | [TSCA ]
Yes | [HazardClass ]
3 | [PackingGroup ]
III | [HS Code ]
29209011 | [Safety Profile]
Moderately toxic by
ingestion and skin contact. An experimental
teratogen. A severe skin and eye irritant.
Flammable liquid when exposed to heat,
flame, or oxidizers. To fight fire, use water,
foam, fog, CO2. Violent explosive reaction
on contact with magnesium perchlorate or
trimethyl platinum(IV) azide tetramer. When
heated to decomposition it emits toxic
fumes of POx. An intermediate in the
production of pesticides, fire retardants, and
organic phosphorus additives. See also
ESTERS. | [Hazardous Substances Data]
121-45-9(Hazardous Substances Data) | [Toxicity]
LD50 orally in Rabbit: 1600 mg/kg LD50 dermal Rabbit 2600 mg/kg |
| Hazard Information | Back Directory | [General Description]
A clear colorless liquid with a strong foul odor. Flash point 99°F. Denser than water and insoluble in water. Vapors heavier than air. Used to make other chemicals. | [Reactivity Profile]
As soon as TRIMETHYL PHOSPHITE(121-45-9) contacted a small amount of magnesium perchlorate in a flask, there was a flash and an explosion that shattered the flask (Allison 1968). | [Air & Water Reactions]
Highly flammable. Insoluble in water and denser than water. Slowly reacts with water to form phosphoric acid and corresponding organic alcohol. | [Health Hazard]
Symptoms of exposure may include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting. | [Potential Exposure]
Trimethyl phosphite is a flame
retardant, and used as an intermediate in the manufacture
of a number of pesticides, and organophosphorus
additives. | [Fire Hazard]
Special Hazards of Combustion Products: Toxic fumes of PO x | [First aid]
If this chemical gets into the eyes, remove any
contact lenses at once and irrigate immediately for at least
15 minutes, occasionally lifting upper and lower lids. Seek
medical attention immediately. If this chemical contacts the
skin, remove contaminated clothing and wash immediately
with soap and water. Seek medical attention immediately. If
this chemical has been inhaled, remove from exposure, begin
rescue breathing (using universal precautions, including
resuscitation mask) if breathing has stopped and CPR if heart
action has stopped. Transfer promptly to a medical facility.
When this chemical has been swallowed, get medical attention.
Give large quantities of water and induce vomiting. Do
not make an unconscious person vomit. Medical observation
is recommended for 24-48 hours after breathing overexposure,
as pulmonary edema may be delayed. As first aid for
pulmonary edema, a doctor or authorized paramedic may consider
administering a drug or other inhalation therapy. | [Shipping]
UN2329 Trimethyl phosphite, Hazard Class: 3;
Labels: 3-Flammable liquid. | [Incompatibilities]
Vaor May form explosive mixture with
air. Incompatible with oxidizers (chlorates, nitrates, peroxides,
permanganates, perchlorates, chlorine, bromine, fluorine,
etc.); contact may cause fires or explosions. Violent
reaction with magnesium perchlorate.
Keep away from alkaline materials, strong bases, strong
acids, oxoacids, epoxides. Reacts (hydrolyzes) with water.
Incompatible with air, moisture. | [Chemical Properties]
Trimethyl phosphite is a colorless liquid.
Distinctive pungent, pyridine-like odor. The Odor
Threshold is 0.0001 ppm. | [Production Methods]
Produced via a reaction between phosphorus trichloride and
methanol in the presence of a tertiary amine catalyst such as
diethylaniline. | [Carcinogenicity]
Trimethyl phosphite was genotoxic in
mouse lymphoma assays but was not mutagenic
in various bacterial assays. | [Purification Methods]
Treat the phosphite with Na (to remove water and any dialkyl phosphonate), then decant and distil it with protection against moisture. It has also been treated with sodium wire for 24hours, then distilled in an inert atmosphere onto activated molecular sieves [Connor et al. J Chem Soc, Dalton Trans 511 1986]. It can be fractionally distilled using a spinning band column at high reflux ratio. It is a colourless liquid which is slowly hydrolysed by H2O. [Gillis et al. J Am Chem Soc 80 2999 1958, NMR: Callis et al. J Am Chem Soc 79 2719 1957, Kosolapoff Organophosphorus Compounds, Wiley p 203 1950, Beilstein 1 IV 1256.] | [Waste Disposal]
Trimethyl phosphite may be burned in a chemical incinerator equipped with an afterburner and scrubber. |
|
|