Description

Trimethyl Phosphate (CAS No. 512-56-1) is a high-purity organophosphorus compound with the molecular formula C₃H₉O₄P, widely utilized in research and industrial applications. This colorless, volatile liquid serves as a versatile reagent in organic synthesis, flame retardant formulations, and as a solvent for specialty chemical processes. With a boiling point of approximately 197°C and a density of 1.21 g/cm³, it exhibits excellent solvation properties for polar compounds. Our product is rigorously tested to ensure ≥98% purity (GC), packaged under inert conditions to prevent degradation, and supplied in amber glass bottles or bulk quantities with customizable options. Ideal for nucleophilic substitution reactions, electrolyte additives, or as a precursor for advanced material synthesis.

Properties

• CAS Number: 512-56-1
• Complexity: 82.4
• IUPAC Name: trimethyl phosphate
• InChI: InChI=1S/C3H9O4P/c1-5-8(4,6-2)7-3/h1-3H3
• InChI Key: WVLBCYQITXONBZ-UHFFFAOYSA-N
• LogP: log Kow = -0.52 and -0.78
• Exact Mass: 140.02384576
• Molecular Formula: C3H9O4P
• Molecular Weight: 140.07
• SMILES: COP(=O)(OC)OC
• Topological: 44.8
• Monoisotopic Mass: 140.02384576
• Physical Description: Trimethyl phosphate appears as a pale straw colored liquid. Inhalation may irritate respiratory tract. Vapor or liquid may irritate skin or eyes. Ingestion may irritate the mucous membranes of the gastrointestinal tract.
• Color/Form: Liquid
• Odor: Pleasant smelling
• Boiling Point: 387 °F at 760 mmHg
• Melting Point: -51 °F
• Flash Point: greater than 300 °F
• Solubility: greater than or equal to 100 mg/mL at 68 °F
• Density: 1.2144 at 68 °F – Denser than water; will sink
• Vapor Pressure: 1 mmHg at 78.8 °F ; 5 mmHg at 128.7 °F; 10 mmHg at 154.0 °F
• Henry’s Law Constant: Henry’s Law constant = 7.2X10-9 atm-cu m/mole at 20 °C
• Stability/Shelf Life: Stable under recommended storage conditions.
• Refractive Index: Index of refraction = 1.3967 at 20 °C/D
• Synonyms: TRIMETHYL PHOSPHATE, Trimethylphosphate, Trimethyl orthophosphate, Phosphoric acid, trimethyl ester, Trimethoxyphosphine oxide, Phosphoric acid trimethyl ester, O,O,O-Trimethyl phosphate, Trimethylfosfat, Phosphate, trimethyl-, NCI-C03781, Trimethylfosfat [Czech], CCRIS 610, Methyl phosphate, (MeO)3PO, NSC 58985, HSDB 5090, UNII-Z1E45TMW1Z, EINECS 208-144-8, Z1E45TMW1Z, DTXSID1021403, CHEBI:46324, AI3-05905, TMP (PHOSPHATE), trimethyl phosphoric acid, NSC-58985, (CH3O)3PO, DTXCID101403, TRIMETHYL PHOSPHATE [HSDB], Trimethylfosfat (Czech), Phosphate, trimethyl, O,O,OTrimethyl phosphate, Phosphate, trimethyl ester, Trimethyl orthophosphoric acid, O,O,O-Trimethyl phosphoric acid, 208-144-8, inchi=1/c3h9o4p/c1-5-8(4,6-2)7-3/h1-3h, wvlbcyqitxonbz-uhfffaoysa-n, 512-56-1, TMPO, MFCD00008348, TZZ, CAS-512-56-1, Trimethyl Phosphate (TMP), trim ethyl phosphate, trimethylphosphoric acid, dimethylphosphonomethanol, PO(OMe)3, bmse000774, Trimethyl phosphate, 97%, SCHEMBL19941, P(O)(OMe)3, Trimethyl phosphate, >=99%, WLN: 1OPO&O1&O1, SCHEMBL6972155, CHEMBL1236486, HY-A0108A, P(O)(OCH3)3, NSC58985, Tox21_201576, Tox21_302740, MSK001804, SBB060441, AKOS009029142, AT32972, NCGC00248617-01, NCGC00248617-02, NCGC00256562-01, NCGC00259125-01, CS-0646319, NS00003887, P0271, ST51046615, EN300-19167, Trimethyl phosphate, SAJ first grade, >=95.0%, A804739, Q2623529

Application

Trimethyl Phosphate is extensively employed as a flame retardant intermediate in polymer industries due to its phosphorus content. It serves as a key solvent in lithium-ion battery electrolytes for enhancing conductivity and thermal stability. Researchers also utilize it as a methylating agent in organic synthesis and as a precursor for producing pesticides and pharmaceuticals.

Safety and Hazards

GHS Hazard Statements

• H302: Harmful if swallowed [Warning Acute toxicity, oral]
• H315: Causes skin irritation [Warning Skin corrosion/irritation]
• H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H340: May cause genetic defects [Danger Germ cell mutagenicity]
• H351: Suspected of causing cancer [Warning Carcinogenicity]

Precautionary Statements

• P203, P264, P264+P265, P270, P280, P301+P317, P302+P352, P305+P351+P338, P318, P321, P330, P332+P317, P337+P317, P362+P364, P405, and P501

Hazard Classes and Categories

• Acute toxicity – Category 4
• Skin corrosion/irritation – Category 2
• Serious eye damage/eye irritation – Category 2B
• Germ cell mutagenicity – Category 1B
• Reproductive toxicity – Category 2
• Specific target organ toxicity – Single exposure – Category 2
• Specific target organ toxicity – Repeated exposure – Category 2

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.