Molekula
Sodium trimetaphosphate
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
Sodium trimetaphosphate is a water-soluble inorganic phosphate used as a sequestrant, dispersant, and pH buffer in detergents, food processing, and industrial cleaning applications. It also serves as a polishing agent in toothpaste formulations, a stabilizer in milk-based puddings and other synthetic dairy products, and a builder in detergents. It appears as a white crystalline powder with a molecular formula of Na3O9P3, a molecular weight of 305.89 g/mol, and is stable at ambient storage conditions. CAS number: 7785-84-4. Signal word: None. Molekula supplies Sodium trimetaphosphate 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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1 g — £77.60 per pack ex VAT · £93.12 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 | White powder |
| Grade | Food grade |
| pH | 6.0 - 9.0 |
| Assay | ≥ 98.5% |
| P2O5 | ≥ 68.5% |
| Insoluble Substance | ≤ 0.1% |
| Lead (Pb) | ≤ 0.001% |
| Arsenic (As) | ≤ 0.0003% |
| Fluoride (F-) | ≤ 0.001% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Refractive Index | 1.433 |
Source: PubChem CID 24579 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 89992549 |
| CAS Number | 7785-84-4 |
| IUPAC Name | trisodium;2,4,6-trioxido-1,3,5,2lambda5,4lambda5,6lambda5-trioxatriphosphinane 2,4,6-trioxide |
| EC Number | 232-088-3 |
| Molecular Formula | Na3O9P3 |
| Molecular Weight | 305.89 |
| Exact Mass | 305.8448 |
| SMILES | [O-]P1(=O)OP(=O)(OP(=O)(O1)[O-])[O-].[Na+].[Na+].[Na+] |
| InChIKey | UGTZMIPZNRIWHX-UHFFFAOYSA-K |
| InChI | InChI=1S/3Na.H3O9P3/c;;;1-10(2)7-11(3,4)9-12(5,6)8-10/h;;;(H,1,2)(H,3,4)(H,5,6)/q3*+1;/p-3 |
| PubChem CID | 24579 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 2835.39.50.00 |
| Tariff Code | 2835390000 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
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
- Cyclic sodium trimetaphosphate
- Cyclisches trinatriummetaphosphat
- Metaphosphoric acid (H3P3O9), trisodium salt
- Metaphosphoric acid, trisodium salt
- Sodium metaphosphate (Na3(P3O9))
- Sodium phosphate ((NaPO3)3)
- Trimetaphosphoric acid (H3P3O9), trisodium salt
- Trisodium metaphosphate
- Trisodium trimetaphosphate
- Trisodium trimetaphosphate (Na3P3O9)
Frequently asked questions
What is sodium trimetaphosphate used for?
It is primarily used as a cross-linking agent for starch and other polysaccharides, for example in producing food-grade modified starches such as distarch phosphate, and in preparing hydrogels.
What is the chemical formula and molecular weight of sodium trimetaphosphate?
The formula is Na3O9P3 with a molecular weight of 305.89 g/mol.
How should sodium trimetaphosphate be stored?
It should be stored at ambient temperature, protected from moisture and contamination.
What grade of sodium trimetaphosphate does Molekula supply?
Molekula supplies technical grade sodium trimetaphosphate.
Can Molekula supply sodium trimetaphosphate in bulk?
Yes, Molekula can supply sodium trimetaphosphate in bulk quantities upon request.
What documentation comes with a purchase of sodium trimetaphosphate?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) with the shipment.
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.