CAS 10361-03-2CAS 50813-16-6PubChem CID 16133893
Sodium Metaphosphate
- Molecular formula
- NaO3P
- Molecular weight
- 101.962 g/mol
- Exact mass
- 101.94827514 Da
- Topological polar surface area
- 57.2 Ų
- Hydrogen-bond donors
- 0
- Hydrogen-bond acceptors
- 3
- Covalent units
- 2
- Defined stereocentres
- 0
Also known as
Kurrol's saltSporixMaddrell's saltSodium Kurrol's saltInsoluble metaphosphateSodium metaphosphate (NaPO3)532IUT7IRVSODIUM METAPHOSPHATE (NA(PO3))
16 more reported names
J139.264FRefChem:1098817233-782-9Metaphosphoric acid, sodium saltSodium phosphate (NaPO3)Metaphosphoric acid (HPO3), sodium saltEINECS 238-595-6HSDB 5055EINECS 233-782-9UNII-532IUT7IRVsodium phosphenateNaO3PMetaphosphoric acid (HPO3), sodium salt (1:1)Sodium-m-phosphate monohydrateSODIUM METAPHOSPHATE [VANDF]SODIUM METAPHOSPHATE [WHO-DD]
External database identifiers
- EPA DTXSID:DTXSID6040244
Evidence from additional scientific databases
NIH PubChem PUG-View
Exact identifier match16133893
Attributed physical-property, hazard, environmental and use annotations.
- Melting Point: 628 °C Source: PAC Chemical Database, U.S. Department of Energy
- Physical Description: Large Crystals; Dry Powder Source: EPA Chemical Data Reporting (CDR)
- Physical Description: White solid, practically insoluble in water; [Merck Index] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
- Solubility: White powder. Practically insol in water and in aq solns of pyrophosphates and hexametaphosphates. Sol in mineral acids. Does not form complexes with Fe(II), Fe(III), U(IV) salts. /Maddrell's salt (polymeric sodium metaphosphate)/ Source: Hazardous Substances Data Bank (HSDB)
- Solubility: Sol in water (pH adjusted to 8-8.6). Insol in organic solvents. Possess dispersing and deflocculating properties, coagulate albumins, and inhibit the crystallinization of slightly sol compds such as calcium carbonate and calcium sulfate. /Glassy sodium metaphosphate; Graham's salt/ Source: Hazardous Substances Data Bank (HSDB)
- Note: This chemical does not meet GHS hazard criteria for 90.5% (526 of 581) of all reports. Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: Not Classified; Reported as not meeting GHS hazard criteria by 526 of 581 companies (only 9.5% companies provided GHS information). For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 581 reports by companies from 8 notifications to the ECHA C&L Inventory.; Reported as not meeting GHS hazard criteria per 526 of 581 reports by companies.; There are 6 notifications provided by 55 of 581 reports by companies with hazard statement code(s).; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- Signal: Warning Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]; H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]; H335 (97.6%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation] Source: European Chemicals Agency (ECHA)
- Precautionary Statement Codes: P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 41 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- Note: This chemical does not meet GHS hazard criteria for 96.2% (25 of 26) of all reports. Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: Not Classified; Reported as not meeting GHS hazard criteria by 25 of 26 companies (only 3.8% companies provided GHS information). For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 26 reports by companies from 3 notifications to the ECHA C&L Inventory.; Reported as not meeting GHS hazard criteria per 25 of 26 reports by companies.; There is 1 notification provided by 1 of 26 reports by companies with hazard statement code(s).; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- Cosmetic Ingredient Review Conclusion: The CIR Expert Panel concluded that the following 31 ingredients are safe in the present practices of use and concentration in cosmetics as described in this safety assessment, when formulated to be non-irritating...Sodium Metaphosphate... Source: Cosmetic Ingredient Review (CIR)
- Cosmetic Ingredient Review Finding(s): Safe for use in cosmetics, with qualifications Source: Cosmetic Ingredient Review (CIR)
- Consumer Uses: Not Known or Reasonably Ascertainable Source: EPA Chemical Data Reporting (CDR)
- Industry Uses: Not Known or Reasonably Ascertainable; Binder Source: EPA Chemical Data Reporting (CDR)
- Cosmetic Ingredient Review Link: CIR ingredient: Sodium Metaphosphate Source: Cosmetic Ingredient Review (CIR)
- Sources/Uses: Used in toothpaste and dentifrices (abrasive), detergents, water softeners, food additives (sequestrant and emulsifier), and textile processing; [HSDB] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
- Industrial Processes with risk of exposure: Textiles (Fiber & Fabric Manufacturing) [Category: Industry] Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
- Uses: Used in toothpaste formulations as an abrasive. Source: Hazardous Substances Data Bank (HSDB)
- Uses: Dental polishing agents, detergent builders, water softeners, sequestrants, emulsifiers, food additives, textile processing, laundering. /Sodium metaphosphate/ Source: Hazardous Substances Data Bank (HSDB)
- Uses: In dentifrices, polishing agents, abrasive detergents. /Maddrell's salt (polymeric sodim metaphosphate)/ Source: Hazardous Substances Data Bank (HSDB)
- Uses: Water softeners and detergents. For leather tanning, dyeing, laundry work, textile processing; for the "threshold treatment" of softening industrial water supplies. /Glassy sodium metaphosphate; Graham's salt/ Source: Hazardous Substances Data Bank (HSDB)
Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record
Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.
Additional source coverage and match status
| Source | Result | Checked |
|---|---|---|
| EMBL-EBI ChEBI | No exact record | 2026-08-31 |
| NIH PubChem PUG-View | Exact match | 2026-08-31 |
A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.
Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.