Molekula
Sodium ammonium phosphate tetrahydrate
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 ammonium phosphate tetrahydrate, also known as microcosmic salt (Phosphorsalz), is a crystalline inorganic salt used primarily in laboratory applications, including the microcosmic salt bead test for metal oxides in qualitative analysis, as an analytical reagent, and as a nitrogen and phosphorus source in microbiological media such as Koser's citrate medium. It has a molecular formula of NaNH4HPO4·4H2O, a molecular weight of 209.07 g/mol, and is stored safely at ambient conditions. The product carries a signal word of "Warning" for handling precautions. Molekula supplies Sodium ammonium phosphate tetrahydrate 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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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.
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Specifications
| Property | Value |
|---|---|
| Appearance | White to Off-white crystalline powder |
| Assay | 98.0 - 101.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90033321 |
| CAS Number | 51750-73-3 |
| IUPAC Name | azanium;sodium;hydrogen phosphate;tetrahydrate |
| Molecular Formula | NaNH4HPO4 · 4H2O |
| Molecular Weight | 209.07 |
| Exact Mass | 209.0276 |
| SMILES | [NH4+].O.O.O.O.OP(=O)([O-])[O-].[Na+] |
| InChIKey | IQTQISLCLWJRPM-UHFFFAOYSA-M |
| InChI | InChI=1S/H3N.Na.H3O4P.4H2O/c;;1-5(2,3)4;;;;/h1H3;;(H3,1,2,3,4);4*1H2/q;+1;;;;;/p-1 |
| PubChem CID | 56924540 |
| REACH Code | Y113 |
| HTS Code | 28352200 |
| Tariff Code | 2835220000 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- 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, 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
- Ammonium hydrogen sodium phosphate tetrahydrate
- Ammonium sodium hydrogen phosphate--water (1/1/1/4)
- ammonium sodium hydrogenphosphate tetrahydrate
- Ammonium Sodium Phosphate Tetrahydrate
- azanium;sodium;hydrogen phosphate;tetrahydrate
- Monoammonium monosodium phosphate tetrahydrate
- Phosphoric acid, monoammonium monosodium salt, tetrahydrate
- Phosphorsalz
- SODIUM AMMONIUM HYDROGEN PHOSPHATE TETRAHYDRATE
- Sodium monoammonium monohydrogen phosphate tetrahydrate
Frequently asked questions
What is sodium ammonium phosphate tetrahydrate commonly used for?
It is primarily used as a buffer in biochemical applications, a nutrient in cell culture media, and in analytical chemistry for pH control.
What is the chemical formula and molecular weight of sodium ammonium phosphate tetrahydrate?
The formula is NaNH₄HPO₄·4H₂O, and the molecular weight is 209.07 g/mol.
How should sodium ammonium phosphate tetrahydrate be stored?
Store it at ambient temperature in a dry, well-ventilated area, away from moisture and incompatible substances.
What purity grades does Molekula supply for this product?
We supply analytical grade sodium ammonium phosphate tetrahydrate, suitable for laboratory and research applications.
Can Molekula supply this product in bulk quantities?
Yes, we can provide bulk quantities upon request—please contact our sales team for pricing and availability.
What documentation comes with an order of sodium ammonium phosphate tetrahydrate?
Each order includes a Certificate of Analysis (CoA), Safety Data Sheet (SDS), and batch-specific documentation for traceability.
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.