Molekula
Dimethyl phosphite
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Dimethyl phosphite is a colorless liquid used as a reagent in organic synthesis, particularly in the preparation of phosphorus-containing compounds and as a reducing agent. Industrially, it serves as an intermediate for insecticides, herbicides and flame retardants, and is also used as a lubricant additive and in adhesive formulations. It has a molecular formula of C2H7O3P, a molecular weight of 110.05 g/mol, and is stored at ambient temperatures. Its CAS number is 868-85-9. Signal word: Warning. Molekula supplies Dimethyl phosphite from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £37.30 per pack ex VAT · £44.76 inc. VAT
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Colourless transparent liquid |
| Assay | ≥ 99.0% |
| Acid | ≤ 0.10% |
| Trimethyl phosphite | ≤ 0.40% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 70 °C |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Mobile, colorless liquid |
| Odour | Mild odor |
| Melting Point | 29 °C |
| Boiling Point | 171 °C |
| Density | 1.2 (relative, water = 1) |
| Solubility (other solvents) | Soluble in water; miscible with most organic solvents |
| Vapour Pressure | 0.135 kPa at 20 °C |
| Refractive Index | 1.4036 |
Source: PubChem CID 13361 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 52961500 |
| CAS Number | 868-85-9 |
| IUPAC Name | methoxyphosphonoyloxymethane |
| Molecular Formula | C2H7O3P |
| Molecular Weight | 110.05 |
| Exact Mass | 110.0133 |
| SMILES | COP(=O)OC |
| InChIKey | HZCDANOFLILNSA-UHFFFAOYSA-N |
| InChI | InChI=1S/C2H7O3P/c1-4-6(3)5-2/h6H,1-2H3 |
| PubChem CID | 13361 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2920.21.0000 |
| Tariff Code | 2920210000 |
Safety & GHS
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H227 Combustible liquid
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H341 Suspected of causing genetic defects
- H351 Suspected of causing cancer
- H412 Harmful to aquatic life with long lasting effects
Precautionary statements
- P201 Obtain special instructions before use
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Bis(hydroxymethyl)phosphine oxide
- Dimethoxyphosphine oxide
- Dimethyl acid phosphite
- Dimethyl hydrogen phosphite
- Dimethyl hydrogen phosphonate
- Dimethyl phosphonate
- Dimethylester kyselini fosforite
- Dimethylester kyseliny fosforite
- Dimethylfosfit
- Dimethylfosfonat
Frequently asked questions
What is dimethyl phosphite used for?
Dimethyl phosphite is primarily used as a reagent in organic synthesis, particularly in the preparation of phosphorus-containing compounds and as a reducing agent.
What is the chemical formula and molecular weight of dimethyl phosphite?
The formula is C2H7O3P with a molecular weight of 110.05 g/mol.
How should dimethyl phosphite be stored?
It should be stored at ambient temperature, away from moisture and incompatible materials.
What grade of dimethyl phosphite does Molekula supply?
Molekula supplies dimethyl phosphite in technical grade; custom grades are available upon request.
Can Molekula supply dimethyl phosphite in bulk?
Yes, Molekula can supply dimethyl phosphite in bulk quantities; please contact sales for pricing and availability.
What documentation comes with a purchase of dimethyl phosphite?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS); additional documentation is available upon request.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.