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993-13-5

993-13-5 Structure

993-13-5 Structure
IdentificationBack Directory
[Name]

METHYLPHOSPHONIC ACID
[CAS]

993-13-5
[Synonyms]

NSC 119358
METHYLPHOSPHONIC ACID
METHANEPHOSPHONIC ACID
Methylphosphonicacid,98%
Phosphonic acid, methyl-
Methanephosphonic acid,98%
Methylphosphonic acid ,97.5%
Methanephosphonic acid, 98% 5GR
Methanephosphonic acid, 98% 25GR
Methylphosphonic acid solution
[EINECS(EC#)]

237-027-4
[Molecular Formula]

CH5O3P
[MDL Number]

MFCD00002137
[MOL File]

993-13-5.mol
[Molecular Weight]

96.02
Chemical PropertiesBack Directory
[Appearance]

white crystals or flakes
[Melting point ]

105-107 °C(lit.)
[Boiling point ]

265.2±23.0 °C(Predicted)
[density ]

1.495±0.06 g/cm3(Predicted)
[vapor pressure ]

0Pa at 20℃
[storage temp. ]

?20°C
[solubility ]

H2O: soluble2.88 g in 30 mL, clear, colorless
[form ]

Crystalline Powder
[pka]

pK1:2.38;pK2:7.74 (25°C)
[color ]

White to off-white
[PH]

0.9-1.4
[Stability:]

Stable. Incompatible with strong oxidizing agents, strong bases.
[Water Solubility ]

Soluble in water and alcohol.
[Sensitive ]

Hygroscopic
[λmax]

λ: 260 nm Amax: ≤0.05
λ: 280 nm Amax: ≤0.04
[BRN ]

1739372
[LogP]

-1.556 at 20℃
[Uses]

Organic synthesis.
[EPA Substance Registry System]

Phosphonic acid, P-methyl- (993-13-5)
Hazard InformationBack Directory
[Chemical Properties]

white crystals or flakes
[Application]

Methylphosphonic acid is used in the production of lubricant additives and for treating textiles.
[Definition]

ChEBI: Methylphosphonic acid is a one-carbon compound that is phosphonic acid in which the hydrogen attached to the phosphorus is substituted by a methyl group. It is a one-carbon compound and a member of phosphonic acids. It is functionally related to a phosphonic acid. It is a conjugate acid of a methylphosphonate(1-).
[Flammability and Explosibility]

Notclassified
[Purification Methods]

Methylphosphonic acid [993-13-5] M 96.0, m 104-106o, 105-107o, 108o, pK 1 2.12, pK 2 7.29. If it tests for Cl-, then add H2O and evaporate to dryness, repeat several times till free from Cl-. The residue solidifies to a wax-like solid. Alternatively, dissolve the acid in the minimum volume of H2O, add charcoal, warm, filter and evaporate to dryness in a vacuum over P2O5. [Kosolapoff J Am Chem Soc 75 3379 1953.] The di-Na salt is prepared from 24g of acid in 50mL of dry EtOH, and a solution of 23g Na dissolved in 400mL EtOH is added. A white precipitate is formed, but the mixture is refluxed for 30minutes to complete the reaction. Filter off the solid and recrystallise it from 50% EtOH. Dry the crystals in a vacuum desiccator. [Thompson J Chem Soc 3292 1952, Beilstein 4 IV 3498.]
Safety DataBack Directory
[Hazard Codes ]

C,T,F
[Risk Statements ]

22-34-39/23/24/25-23/24/25-11
[Safety Statements ]

26-36/37/39-45-36/37-16-7
[RIDADR ]

UN 3261 8/PG 2
[WGK Germany ]

3
[F ]

10
[HazardClass ]

8
[PackingGroup ]

II
[HS Code ]

29310099
[Hazardous Substances Data]

993-13-5(Hazardous Substances Data)
Raw materials And Preparation ProductsBack Directory
[Raw materials]

Phosphonic acid, P-methyl-, bis(1,1-dimethylethyl) ester-->Sarin.-->(3S-trans)-3-(t-butyloxycarbonylaMino)-1-hydroxy-4-Methyl-2-azetidinone-->DIISOPROPYL METHYLPHOSPHONATE-->GB ACID-->DI-N-BUTYL METHYLPHOSPHONATE-->METHYLPHOSPHONIC DICHLORIDE-->CHLOROMETHYLPHOSPHONIC ACID
[Preparation Products]

Glyphosate-->NEODYMIUM CARBONATE OCTAHYDRATE-->Lanthanum oxide-->Glyphosine-->Glufosinate-ammonium-->boile water treatment agent NS-402-->DIPHENYL METHYLPHOSPHONATE-->ETHYL METHYLPHOSPHONIC ACID
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