Stannous pyrophosphate
Synonym(s):Stannous pyrophosphate
- CAS NO.：15578-26-4
- Empirical Formula: O7P2Sn2
- Molecular Weight: 411.36
- MDL number: MFCD00167376
- EINECS: 239-635-5
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:17:26
What is Stannous pyrophosphate?
Chemical properties
White Solid
Chemical properties
Stannous pyrophosphate, Sn2P2O7, sp gr 4.009 at 16 °C (60.8 °F), is an amorphous white powder, decomposing at above 400 °C. It is insoluble in water and soluble in concentrated mineral acids and sodium pyrophosphate.
The Uses of Stannous pyrophosphate
Tin(II) pyrophosphate is used to inhibit the formation of volatile sulfur compounds. Further, it is used for cyanide-free tin coating.
The Uses of Stannous pyrophosphate
Tin(II) Pyrophosphate inhibit the formation of volatile sulphur compounds (VSC).
Production Methods
It is prepared from stannous chloride and sodium pyrophosphate, and used as a caries preventative in toothpaste and as a diagnostic aid in radioactive bone scanning and red-blood-cell labeling.
brand name
TechneScan PYP (Mallinckrodt).
Properties of Stannous pyrophosphate
| Melting point: | >400°C (dec.) |
| Density | 4,01 g/cm3 |
| storage temp. | Refrigerator |
| solubility | insoluble in H2O; soluble in concentrated acid solutions |
| form | Powder |
| color | White |
| Specific Gravity | 4.01 |
| Water Solubility | Insoluble in water. |
| Merck | 14,8788 |
| Exposure limits | ACGIH: TWA 2 mg/m3 NIOSH: IDLH 100 mg/m3; TWA 2 mg/m3 |
| CAS DataBase Reference | 15578-26-4(CAS DataBase Reference) |
| EPA Substance Registry System | Diphosphoric acid, tin(2+) salt (1:2) (15578-26-4) |
Safety information for Stannous pyrophosphate
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Stannous pyrophosphate
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