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ChemicalBook >> CAS DataBase List >> Trimethyl phosphite

Trimethyl phosphite

Trimethyl phosphite price.
  • $16 - $681
  • Product name: Trimethyl phosphite
  • CAS: 121-45-9
  • MF: C3H9O3P
  • MW: 124.08
  • EINECS:204-471-5
  • MDL Number:MFCD00008350
  • Synonyms:TRIMETHYL PHOSPHONATE;TRIMETHYL PHOSPHITE;fosforyntrojmetylowy ;Methyl phosphite ((MeO)3P);TRIMETHYLPHOSPHIT S;Trimethyl phosphite solution ;Phosphonousacidtrimethylester ;Trimethoxyfosfin
Price29 Properties Safety Information Description
29 prices
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Brand
  • AK Scientific
  • Apolloscientific
  • BroadPharm
  • ProChem
  • Sigma-Aldrich
  • Strem Chemicals
  • Thermo Scientific Chemicals
  • TRC
  • Usbiological
Package
  • 5g
  • 10g
  • 25mL
  • 25g
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  • 50ml
  • 100mL
  • 100g
  • 250g
  • 250ml
  • 500g
  • 500mL
  • 1l
  • 1kg
  • 2.5kg
  • ManufacturerAK Scientific
  • Product numberS688
  • Product descriptionTrimethyl phosphite 97%
  • Packaging5g
  • Price$16
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberJ55469
  • Product descriptionTrimethyl phosphite
  • Packaging25g
  • Price$20
  • Updated2021-12-16
  • Buy
  • ManufacturerAK Scientific
  • Product numberS688
  • Product descriptionTrimethyl phosphite 97%
  • Packaging25g
  • Price$30
  • Updated2026-06-04
  • Buy
  • ManufacturerAK Scientific
  • Product numberS688
  • Product descriptionTrimethyl phosphite 97%
  • Packaging100g
  • Price$71
  • Updated2026-06-04
  • Buy
  • ManufacturerApolloscientific
  • Product numberOR71098
  • Product descriptionTrimethyl phosphite 99%
  • Packaging25g
  • Price$90
  • Updated2021-12-16
  • Buy
  • ManufacturerApolloscientific
  • Product numberOR71098
  • Product descriptionTrimethyl phosphite 99%
  • Packaging100g
  • Price$212
  • Updated2021-12-16
  • Buy
  • ManufacturerBroadPharm
  • Product numberBP-21379
  • Product descriptionTrimethyl phosphite 97%
  • Packaging10g
  • Price$30
  • Updated2021-12-16
  • Buy
  • ManufacturerProChem
  • Product number3716
  • Product descriptionTrimethyl phosphite 99.999%
  • Packaging25mL
  • Price$40
  • Updated2021-12-16
  • Buy
  • ManufacturerProChem
  • Product number3716
  • Product descriptionTrimethyl Phosphite 99.999%
  • Packaging25g
  • Price$65
  • Updated2026-05-25
  • Buy
  • ManufacturerProChem
  • Product number3716
  • Product descriptionTrimethyl Phosphite 99.999%
  • Packaging100g
  • Price$150
  • Updated2026-05-25
  • Buy
  • ManufacturerSigma-Aldrich
  • Product number8.00553
  • Product descriptionTrimethyl phosphite for synthesis
  • Packaging500mL
  • Price$167
  • Updated2026-04-30
  • Buy
  • ManufacturerSigma-Aldrich
  • Product number92730
  • Product descriptionTrimethyl phosphite ≥97%
  • Packaging1l
  • Price$144
  • Updated2026-04-30
  • Buy
  • ManufacturerSigma-Aldrich
  • Product number92730
  • Product descriptionTrimethyl phosphite ≥97%
  • Packaging250ml
  • Price$78
  • Updated2026-04-30
  • Buy
  • ManufacturerSigma-Aldrich
  • Product number431249
  • Product descriptionTrimethyl phosphite ≥99.999% trace metals basis
  • Packaging25ml
  • Price$103
  • Updated2023-06-20
  • Buy
  • ManufacturerSigma-Aldrich
  • Product number240907
  • Product descriptionTrimethyl phosphite ≥99%
  • Packaging100g
  • Price$112
  • Updated2026-04-30
  • Buy
  • ManufacturerSigma-Aldrich
  • Product number92730
  • Product descriptionTrimethyl phosphite ≥97%
  • Packaging50ml
  • Price$46.3
  • Updated2026-04-30
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
AK Scientific S688 Trimethyl phosphite 97% 5g $16 2026-06-04 Buy
AK Scientific J55469 Trimethyl phosphite 25g $20 2021-12-16 Buy
AK Scientific S688 Trimethyl phosphite 97% 25g $30 2026-06-04 Buy
AK Scientific S688 Trimethyl phosphite 97% 100g $71 2026-06-04 Buy
Apolloscientific OR71098 Trimethyl phosphite 99% 25g $90 2021-12-16 Buy
Apolloscientific OR71098 Trimethyl phosphite 99% 100g $212 2021-12-16 Buy
BroadPharm BP-21379 Trimethyl phosphite 97% 10g $30 2021-12-16 Buy
ProChem 3716 Trimethyl phosphite 99.999% 25mL $40 2021-12-16 Buy
ProChem 3716 Trimethyl Phosphite 99.999% 25g $65 2026-05-25 Buy
ProChem 3716 Trimethyl Phosphite 99.999% 100g $150 2026-05-25 Buy
Sigma-Aldrich 8.00553 Trimethyl phosphite for synthesis 500mL $167 2026-04-30 Buy
Sigma-Aldrich 92730 Trimethyl phosphite ≥97% 1l $144 2026-04-30 Buy
Sigma-Aldrich 92730 Trimethyl phosphite ≥97% 250ml $78 2026-04-30 Buy
Sigma-Aldrich 431249 Trimethyl phosphite ≥99.999% trace metals basis 25ml $103 2023-06-20 Buy
Sigma-Aldrich 240907 Trimethyl phosphite ≥99% 100g $112 2026-04-30 Buy
Sigma-Aldrich 92730 Trimethyl phosphite ≥97% 50ml $46.3 2026-04-30 Buy
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Properties

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.)
Flash point :82 °F
storage temp. :2-8°C
solubility :Chloroform, DMSO (Sparingly)
form :Liquid
Specific Gravity :1.052
color :Colorless
explosive limit :5.2-61.2%(V)
Water Solubility :Hydrolyzes with water.
Sensitive :Air & Moisture Sensitive
Hydrolytic Sensitivity :4: no reaction with water under neutral conditions
BRN :956570
Henry's Law Constant :9.0×10-1 mol/(m3Pa) at 25℃, HSDB (2015)
Exposure limits :TLV-TWA 10 mg/m3 (2 ppm) (ACGIH).
Stability :Moisture Sensitive
InChI :1S/C3H9O3P/c1-4-7(5-2)6-3/h1-3H3
InChIKey :CYTQBVOFDCPGCX-UHFFFAOYSA-N
SMILES :P(OC)(OC)OC
CAS DataBase Reference :121-45-9(CAS DataBase Reference)
NIST Chemistry Reference :Phosphorous acid, trimethyl ester(121-45-9)
EPA Substance Registry System :Trimethyl phosphite (121-45-9)

Safety Information

Symbol(GHS): Flame (GHS02)
Signal word: Warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H226 Flammable liquid and vapour Flammable liquids Category 3 Warning
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P233 Keep container tightly closed.
P240 Ground/bond container and receiving equipment.
P241 Use explosion-proof electrical/ventilating/lighting/…/equipment.
P242 Use only non-sparking tools.
P243 Take precautionary measures against static discharge.
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.
P370+P378 In case of fire: Use … for extinction.
P403+P235 Store in a well-ventilated place. Keep cool.
P501 Dispose of contents/container to..…

Description

Trimethyl phosphite has been used primarily as an intermediate in the manufacture of pesticides and the synthesis of organophosphate insecticides. It is also used as a fire retardants in the production of textiles, as an intermediate in the production of flame-retardant polymers for polyurethane foams, and as a catalyst.

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Suppliers and manufacturers

JINAN QUANSHENG CHEMICAL CO.,LTD shanghaidelaikekejiyouxiangongsi Wuhan Jieyou Shun Chemical Technology Co., Ltd. Shandong Aite Chemical Co., Ltd Meryer (Shanghai) Chemical Technology Co., Ltd. Alfa Aesar ShangHai DEMO Chemical Co.,Ltd Energy Chemical Shanghai Hanhong Scientific Co.,Ltd. Beckmann-Kenko GmbH