METHYLPHOSPHONIC ACID
Synonym(s):MPA
- CAS NO.:993-13-5
- Empirical Formula: CH5O3P
- Molecular Weight: 96.02
- MDL number: MFCD00002137
- EINECS: 213-607-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-07-11 17:04:31
What is METHYLPHOSPHONIC ACID?
Chemical properties
white crystals or flakes
The Uses of METHYLPHOSPHONIC ACID
Methylphosphonic acid is used to produce methyl-phosphonic acid dichloride by chlorination.
The Uses of METHYLPHOSPHONIC ACID
Organic synthesis.
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-).
What are the applications of Application
Methylphosphonic acid is used in the production of lubricant additives and for treating textiles.
Flammability and Explosibility
Not classified
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.]
Properties of METHYLPHOSPHONIC ACID
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 |
pka | pK1:2.38;pK2:7.74 (25°C) |
form | Crystalline Powder |
color | White to off-white |
PH | 0.9-1.4 |
Water Solubility | Soluble in water and alcohol. |
λmax | λ: 260 nm Amax: ≤0.05 λ: 280 nm Amax: ≤0.04 |
Sensitive | Hygroscopic |
BRN | 1739372 |
Stability: | Stable. Incompatible with strong oxidizing agents, strong bases. |
EPA Substance Registry System | Phosphonic acid, P-methyl- (993-13-5) |
Safety information for METHYLPHOSPHONIC ACID
Signal word | Danger |
Pictogram(s) |
Corrosion Corrosives GHS05 |
GHS Hazard Statements |
H314:Skin corrosion/irritation |
Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for METHYLPHOSPHONIC ACID
New Products
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