聚磷酸钠

Description

Sodium polyphosphate · CAS 68915-31-1 · Na2H2P2O7. UNII H5WVD9LZUD. Density: 1.862 @25 °C.

Identification

CAS Registry Number	68915-31-1
PubChem CID	24451
Molecular formula	Na2H2P2O7
IUPAC name	disodium;[hydroxy(oxido)phosphoryl] hydrogen phosphate
UNII (FDA)	H5WVD9LZUD

Computed Descriptors

Molecular Weight	221.94
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	7
Rotatable Bond Count	2
Exact Mass	221.90711496
Monoisotopic Mass	221.90711496
Topological Polar Surface Area	130
Heavy Atom Count	11
Formal Charge	0
Complexity	143

Physical & Chemical Properties

Density	1.862 @25 °C

Physical description & handling notes

• Large Crystals; CBI; Dry Powder; Other Solid; Liquid
• White powder or grains
• White solid; [Merck Index] White odorless powder; [MSDSonline]
• White crystalline powder
• Soluble in water
• Sol in water

Regulatory Status

Regulatory & Food Contact	FDA Substance added to food: COLOR OR COLORING ADJUNCT, DOUGH STRENGTHENER, EMULSIFIER OR EMULSIFIER SALT, FL ACIDITY_REGULATOR; RAISING_AGENT; SEQUESTRANT: Food Additives COLOR OR COLORING ADJUNCT, DOUGH STRENGTHENER, EMULSIFIER OR EMULSIFIER SALT, FLAVORING AGENT OR ADJUVANT, FLO ACID SODIUM PYROPHOSPHATE Group MTDI for phosphorus from all sources, expressed as P TRS 683-JECFA 26/25
GHS notification summary	14.5% (71 / 490)

GHS Hazard Classification

GHS notification summary	14.5% (71 / 490)
Reported hazard statements	H302 (25.5%), H319 (84.5%)

Documented Uses

• CIR ingredient: Disodium Pyrophosphate
• Used in baking powders and as food acidulant; Hexahydrate: Used in electroplating, metal cleaning and phosphatizing, and drilling muds; [HSDB]
• Acid and Alkali Cleaning of Metals [Category: Clean]
• Electroplating [Category: Plate]
• Petroleum Production and Refining [Category: Industry]
• Electroplating; metal cleaning & phosphatizing; drilling muds buffer; sesquestrent peptizing agent in cheese & meat products; frozen desserts /Hexahydrate/

Synonyms

7758-16-9; Sodium acid pyrophosphate; Disodium dihydrogen pyrophosphate; DISODIUM PYROPHOSPHATE; Disodium dihydrogen diphosphate; Dinatriumpyrophosphat; Disodium acid pyrophosphate; Diphosphoric acid, disodium salt; SAPP; H5WVD9LZUD; Pyrophosphoric acid, disodium salt; RefChem:135083; 231-835-0; Dinatriumpyrophosphat [German]; Disodium dihydrogenpyrophosphate; HSDB 377

Frequently Asked Questions

What are the CAS number and molecular formula of Sodium polyphosphate?

CAS 68915-31-1; molecular formula Na2H2P2O7; molecular weight — g/mol.

What other names is Sodium polyphosphate known by?

7758-16-9, Sodium acid pyrophosphate, Disodium dihydrogen pyrophosphate, DISODIUM PYROPHOSPHATE, Disodium dihydrogen diphosphate, Dinatriumpyrophosphat.

What is the regulatory status of Sodium polyphosphate?

Documented regulatory listings: FDA Substance added to food: COLOR OR COLORING ADJUNCT, DOUGH STRENGTHENER, EMULSIFIER OR EMULSIFIER SALT, FL; ACIDITY_REGULATOR; RAISING_AGENT; SEQUESTRANT: Food Additives; COLOR OR COLORING ADJUNCT, DOUGH STRENGTHENER, EMULSIFIER OR EMULSIFIER SALT, FLAVORING AGENT OR ADJUVANT, FLO.

Is Sodium polyphosphate classified as hazardous?

14.5% of GHS notifications report no hazard classification (71 of 490).

What are the key physical properties of Sodium polyphosphate?

Density: 1.862 @25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.