sodium metaphosphate
metaphosphoric acid (HPO3), sodium salt
Used as a food additive [EAFUS]
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CAS Number: 10361-03-2Picture of molecule
Other: 1313-95-7
ECHA EINECS - REACH Pre-Reg: 233-782-9
Molecular Weight: 101.96113128
Formula: Na O3 P
BioActivity Summary: listing
Category: buffering agents, sequestrants
US / EU / FDA / JECFA / FEMA / FLAVIS / Scholar / Patent Information:
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Physical Properties:
Appearance: white powder (est)
Assay: 95.00 to 100.00 % 
Food Chemicals Codex Listed: No
Flash Point: 32.00 °F. TCC ( 0.00 °C. ) (est)
Soluble in:
 water, 1e+006 mg/L @ 25 °C (est)
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Organoleptic Properties:
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Cosmetic Information:
CosIng: cosmetic data
Cosmetic Uses: buffering agents
chelating agents
oral care agents
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BOC Sciences
For experimental / research use only.
EMD Millipore
For experimental / research use only.
Sodium polyphosphate
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Safety Information:
Hazards identification
Classification of the substance or mixture
GHS Classification in accordance with 29 CFR 1910 (OSHA HCS)
None found.
GHS Label elements, including precautionary statements
Hazard statement(s)
None found.
Precautionary statement(s)
None found.
Oral/Parenteral Toxicity:
intraperitoneal-mouse LD50  830 mg/kg
Revue d'Epidemiologie, Medecine Sociale et Sante Publique. Vol. 10, Pg. 391, 1962.

Dermal Toxicity:
Not determined
Inhalation Toxicity:
Not determined
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Safety in Use Information:
Category: buffering agents, sequestrants
Recommendation for sodium metaphosphate usage levels up to:
 not for fragrance use.
Recommendation for sodium metaphosphate flavor usage levels up to:
 not for flavor use.
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Safety References:
EPI System: View
NLM Hazardous Substances Data Bank: Search
Carcinogenic Potency Database: Search
EPA Substance Registry Services (TSCA): 10361-03-2
EPA ACToR: Toxicology Data
EPA Substance Registry Services (SRS): Registry
Laboratory Chemical Safety Summary : 16133893
National Institute of Allergy and Infectious Diseases: Data
WGK Germany: 1
Chemidplus: 0010361032
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NIST Chemistry WebBook: Search Inchi
Canada Domestic Sub. List: 10361-03-2
Pubchem (cid): 16133893
Pubchem (sid): 134990348
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Other Information:
(IUPAC): Atomic Weights of the Elements 2009
(IUPAC): Atomic Weights of the Elements 2009 (pdf)
Videos: The Periodic Table of Videos
tgsc: Atomic Weights use for this web site
(IUPAC): Periodic Table of the Elements
HMDB (The Human Metabolome Database): Search
FooDB: FDB010271
Haz-Map: View
ChemSpider: View
Wikipedia: View
RSC Learn Chemistry: View
supplied in the form of a powder, flakes, and as small, broken, glass-like particles. glassy sodium metaphosphate; graham's salt
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Potential Blenders and core components note
None Found
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Potential Uses:
 buffering agents 
 chelating agents 
 oral care agents 
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Occurrence (nature, food, other): note
 not found in nature
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metaphosphoric acid (HPO3), sodium salt
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PubMed: Synthesis and structural data of a Fe-base sodium metaphosphate compound, NaFe(PO3)3.
PubMed: Ultraviolet and infrared absorption spectra of Cr2O3 doped-sodium metaphosphate, lead metaphosphate and zinc metaphosphate glasses and effects of gamma irradiation: a comparative study.
PubMed: Extended Czjzek model applied to NMR parameter distributions in sodium metaphosphate glass.
PubMed: Bath salt intoxication causing acute kidney injury requiring hemodialysis.
PubMed: Emergency do not consume/do not use concentrations for blended phosphates in drinking water.
PubMed: UV-visible, Raman and E.S.R. studies of gamma-irradiated NiO-doped sodium metaphosphate glasses.
PubMed: Faecal indicator bacteria enumeration in beach sand: a comparison study of extraction methods in medium to coarse sands.
PubMed: In vivo behavior of bioactive phosphate glass-ceramics from the system P2O5-Na2O-CaO containing TiO2.
PubMed: Easy preparation of dietary fiber with the high water-holding capacity from food sources.
PubMed: Analysis of the structural changes of a phosphate glass during its dissolution in simulated body fluid.
PubMed: Final report on the safety assessment of Sodium Metaphosphate, Sodium Trimetaphosphate, and Sodium Hexametaphosphate.
PubMed: Thermo-Raman studies on NaH(2)PO(4)-H(2)O for dehydration, condensation, and phase transformation.
PubMed: Dissolution of calcium pyrophosphate crystals by polyphosphates: an in vitro and ex vivo study.
PubMed: Interaction between bacteriophage PBS1 and clay minerals and transduction of Bacillus subtilis by clay-phage complexes.
PubMed: Effect of a phosphorylated guar gum hydrolysate on increased calcium solubilization and the promotion of calcium absorption in rats.
PubMed: Determination of trace nitrite ion in water by spectrophotometric method after preconcentration on an organic solvent-soluble membrane filter.
PubMed: Pseudomonas aureofaciens in soil: survival and recovery efficiency.
PubMed: Effect of chelatants on gellan gel rheological properties and setting temperature for immobilization of living bifidobacteria.
PubMed: Preliminary biocompatibility screening of several biodegradable phosphate fiber reinforced polymers.
PubMed: Biocompatibility and mechanical properties of a totally absorbable composite material for orthopaedic fixation devices.
PubMed: Effectiveness of silane treatment on absorbable microfibers.
PubMed: Toxicity of calcium sodium metaphosphate fiber. II. Chronic inhalation and oncogenicity study.
PubMed: Toxicity of calcium sodium metaphosphate fiber. I. In vitro and in vivo degradation and clearance studies.
PubMed: The effectiveness of two test dentifrices on dental plaque formation: a 1-week clinical study.
PubMed: The state of fluorides in toothpastes.
PubMed: In vitro evaluation of the cytotoxic potential of a novel man-made fiber, calcium sodium metaphosphate fiber (Phosphate Fiber).
PubMed: Specificity of virus adsorption to clay minerals.
PubMed: Adsorption of coliphages T1 and T7 to clay minerals.
PubMed: [Tetracycline phosphate complex and mixtures of tetracycline base with sodium metaphosphate].
PubMed: Calcium ion activities in supersaturated solutions stabilized by sodium metaphosphate as determined by clay membrane electrodes.
PubMed: The Sanitary Value of Sodium Metaphosphate in Mechanical Dish-washing.
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