756-79-6

Name	Dimethyl methylphosphonate
CAS	756-79-6
EINECS(EC#)	212-052-3
Molecular Formula	C3H9O3P
MDL Number	MFCD00008349
Molecular Weight	124.08
MOL File	756-79-6.mol

Chemical Properties

Appearance	colourless liquid
Melting point	<50°
Boiling point	181 °C(lit.)
density	1.145 g/mL at 25 °C(lit.)
vapor pressure	<0.1 mm Hg ( 20 °C)
refractive index	n20/D 1.413(lit.)
Fp	156 °F
form	Liquid
pka	pKa (20°) in water: 2.37
color	Clear colorless
Specific Gravity	1.16
Stability:	Stability Combustible. Incompatible with strong oxidizing agents, strong bases. May soften some rubbers or plastics. Hydrolyzes slowly in contact with water.
Water Solubility	>=10 g/100 mL at 21 ºC
Merck	14,3391
BRN	878263
CAS DataBase Reference	756-79-6(CAS DataBase Reference)
NIST Chemistry Reference	Phosphonic acid, methyl-, dimethyl ester(756-79-6)
EPA Substance Registry System	756-79-6(EPA Substance)

Safety Data

Hazard Codes	T,Xi
Risk Statements	R36:Irritating to the eyes. less more
Safety Statements	S53:Avoid exposure-obtain special instruction before use . S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . less more
RIDADR	2810
WGK Germany	2
RTECS	SZ9120000
Hazard Note	Irritant/Toxic
TSCA	Yes
Safety Profile	Moderately toxic by intravenous route. Experimental reproductive effects. Questionable carcinogen with experimental carcinogenic data. Mutation data reported. An experimental nerve gas stimulant. A flame retardant. When heated to decomposition it emits toxic fumes of POx less more
Hazardous Substances Data	756-79-6(Hazardous Substances Data)
Toxicity	LD50 in rats, mice (mg/kg): 10190, >6810 orally (Rowland) less more

Raw materials And Preparation Products

Hazard Information

General Description

Clear colorless liquid with a pleasant odor.

Reactivity Profile

DIMETHYL METHYLPHOSPHONATE(756-79-6) is incompatible with strong oxidizing agents and strong bases. DIMETHYL METHYLPHOSPHONATE(756-79-6) reacts with organic halides at 302-392° F. When heated to temperatures greater than 302° F, DIMETHYL METHYLPHOSPHONATE(756-79-6) will act as an alkylating agent with basic nitrogen compounds and phenols. DIMETHYL METHYLPHOSPHONATE(756-79-6) reacts with enol lactones. This compound has plasticizing properties and may soften or deteriorate some plastics and elastomers (particularly vinyl-based resins, neoprene and natural rubbers) upon contact.

Air & Water Reactions

Highly flammable. Water soluble. Hydrolyzes slowly upon contact with water.

Fire Hazard

This chemical is combustible.

Chemical Properties

colourless liquid

Uses

As a flame retardant, a preignition additive for gasoline, an antifoam agent, a plasticizer and stabilizer, a textile conditioner, and an antistatic agent; used experimentally to mimic the physical and spectroscopic (but not biological) properties of anticholinesterase agents

Uses

Dimethyl methylphosphonate is used as a catalyst and a reagent in organic synthesis for the conversion of esters to ketophosphonates. It is an additive for the synthesis of unsaturated polyester resin which has flame retardant high phosphorous and UV-cured epoxy acrylate. It finds application as hydraulic fluids as well.

Uses

NMR probe for cell volume. Flame retardant. Simulant for nerve agents.

Synthesis Reference(s)

Synthetic Communications, 20, p. 239, 1990 DOI: 10.1080/00397919008052289

Health Hazard

Dimethyl methylphosphonate (DMMP) administered to male rats is a reproductive toxicant and carcinogen. Effects in humans are unknown.

Material Safety Data Sheet(MSDS)

Spectrum Detail

Well-known Reagent Company Product Information

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