Basic information
- Name:
Metaphosphoric acid, hexasodium salt
- Superlist Name:
- Sodium hexametaphosphate
- CAS No.:
10124-56-8
- Molecular Structure:
- Formula:
- Na6O18P6
- Molecular Weight:
- 611.770386 [g/mol] .
- Deleted CAS:
- 16210-45-0,193678-44-3,20517-55-9,8012-14-4
- Synonyms:
- Sodium phosphate, tribasic;Metaphosphoric acid (H6P6O18), sodium salt (1:6);Phosphate, sodium hexameta;SHMP;Sodium polymeta phosphate;
- EINECS:
- 233-343-1
- Density:
- 2.181 g/cm3
- Melting Point:
- 616 °C
- Appearance:
- white granular solid
- Safety Description:
- 24/25 Details
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Chemistry
Molecular structure of Sodium hexametaphosphate (CAS NO.10124-56-8) is:
Product Name: Sodium hexametaphosphate
CAS Registry Number: 10124-56-8
IUPAC Name: hexasodium 1,3,5,7,9,11-hexaoxido-2,4,6,8,10,12-hexaoxa-1λ5,3λ5,5λ5,7λ5,9λ5,11λ5-hexaphosphacyclododecane 1,3,5,7,9,11-hexaoxide
Molecular Weight: 611.770386 [g/mol]
Molecular Formula: Na6O18P6
H-Bond Donor: 0
H-Bond Acceptor: 18
EINECS: 233-343-1
Melting Point: 616 °C
Density: 2.181g/cm3
Refractive index: 1.482
Stability: Stable, Keep dry
Product Categories: Inorganic & Organic chemicals;Inorganics;Inorganic Chemicals;Water Ttreatment Chemicals
Uses
Sodium hexametaphosphate (CAS NO.10124-56-8) is used as a sequestrant and has applications with in a wide variety of industries, including as a food additive in which it is used under the E number E452i. Its products are used for water softening and detergents, when added with sodium carbonate. It is also used as a dispersing agent to break down clay and other soil types.One of the lesser-known uses for sodium hexametaphosphate is as a deflocculant in the making of Terra sigillata, a ceramic technique using a fine particled slip. However, it is also a whitening ingredient included in some whitening toothpastes and mouthwashes.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mouse | LD50 | intraperitoneal | 870mg/kg (870mg/kg) | KIDNEY, URETER, AND BLADDER: "CHANGES IN TUBULES (INCLUDING ACUTE RENAL FAILURE, ACUTE TUBULAR NECROSIS)" | Revue d'Epidemiologie, Medecine Sociale et Sante Publique. Vol. 10, Pg. 391, 1962. |
| mouse | LD50 | intravenous | 62mg/kg (62mg/kg) | Arzneimittel-Forschung. Drug Research. Vol. 7, Pg. 445, 1957. | |
| mouse | LD50 | oral | 4320mg/kg (4320mg/kg) | PERIPHERAL NERVE AND SENSATION: FLACCID PARALYSIS WITHOUT ANESTHESIA (USUALLY NEUROMUSCULAR BLOCKAGE) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 38(9), Pg. 19, 1973. |
| mouse | LD50 | subcutaneous | 1300mg/kg (1300mg/kg) | Arzneimittel-Forschung. Drug Research. Vol. 7, Pg. 445, 1957. | |
| rabbit | LDLo | intravenous | 140mg/kg (140mg/kg) | Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 169, Pg. 238, 1933. | |
| rat | LD50 | oral | 6200mg/kg (6200mg/kg) | PERIPHERAL NERVE AND SENSATION: FLACCID PARALYSIS WITHOUT ANESTHESIA (USUALLY NEUROMUSCULAR BLOCKAGE) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 38(9), Pg. 19, 1973. |
Consensus Reports
Reported in EPA TSCA Inventory.
Safety Profile
Poison by intravenous route. Moderately toxic by intraperitoneal and subcutaneous routes. Mildly toxic by ingestion. When heated to decomposition it emits toxic fumes of POx and Na2O. See also PHOSPHATES.
Safety Statements: 24/25
S24/25:Avoid contact with skin and eyes.
Specification
Sodium hexametaphosphate , its cas register number is 10124-56-8. It also can be called Graham's salt ; Metaphosphoric acid, hexasodium salt ; Sodium polymetaphosphate ; Calgon ; Calgon (old) ; Calgon S ; Caswell No. 772 ; Chemi-charl ; EPA Pesticide Chemical Code 076402 ; FEMA 3027 ; Graham's salt ; HMP ; HSDB 5053 ; Hexametaphosphate, sodium salt ; Hexasodium hexametaphosphate ; Hexasodium metaphosphate ; Medi-Calgon ; Metaphosphoric acid (H6P6O18), hexasodium salt ; Metaphosphoric acid, hexasodium salt ; Natrium hexametaphosphat ; Natrium hexametaphosphat [German] ; Phosphate, sodium hexameta ; Polyphos ; SHMP ; Sodium hexametaphosphate (Na6P6O18) ; Sodium phosphate (Na6P6O18) ; Sodium phosphate, tribasic ; Sodium polymeta phosphate ; Metaphosphoric acid (H6P6O18), hexasodium salt ; Metaphosphoric acid (H6P6O18), sodium salt (1:6) ; Metaphosphoric acid, hexasodium salt ; Sodium metaphosphate ; Sodium phosphate, tribasic . It is a white granular solid. It hydrolyzes in aqueous solution, particularly under acidic conditions, to sodium trimetaphosphate and sodium orthophosphate .