Calcium pyrophosphate (Ca2P2O7) (HCID 24632)

Überblick

Calcium diphosphate is a calcium phosphate. It contains a diphosphate(4-).

Namen und Bezeichner

Bevorzugter Name: Calcium pyrophosphate (Ca2P2O7)
IUPAC: dicalcium;phosphonato phosphate
Lokaler Name: Dicalciumpyrophosphat
Englischer Name: CALCIUM PYROPHOSPHATE
Summenformel: Ca2O7P2
Molmasse: 254.1

Namen und Synonyme

CALCIUM PYROPHOSPHATE7790-76-3Dicalcium pyrophosphateDiphosphoric acid, calcium saltDiphosphoric acid, calcium salt (1:2)Calcium pyrophosphate (Ca2P2O7)Calcium phosphate (Ca2P2O7)Pyrophosphoric acid, calcium salt (1:2)X69NU20D19CHEBI:32598DTXSID50872512Diphosphate, Calcium

Weitere Namen anzeigen

CALCIUM DIPHOSPHATEDICALCIUMDIPHOSPHATECalcium pyrophosphatCALCIUM PHOSPHATE (PYRO)calciumphosphate(ca2p2o7)Calcium Pyrophosphate (98%)Diphosphoricacid,calciumsaltCalcium phosphate (pyro) min

Pyrophosphate, CalciumRefChem:122901Pyrophosphate Dihydrate, CalciumMonohydrate Calcium PyrophosphateDTXCID40820163Pyrophosphate, Monohydrate Calcium232-221-5A7X6BBX98K

Datenbank-Bezeichner

CAS: 10086-45-0、7790-76-3
PubChem CID: 24632
DTXSID: DTXSID50872512
ChEBI: CHEBI:32598
UNII: X69NU20D19
EC Number: 232-221-5
Nikkaji: J96.067E

Eigenschaften

Berechnete Struktureigenschaften

Polarare Oberfläche (TPSA): 136 Å²
H-Brücken-Donoren: 0
H-Brücken-Akzeptoren: 7
Frei drehbare Bindungen: 0
Schwere Atome: 11
Formalladung: 0
Komplexität: 124

Experimentelle und physikochemische Eigenschaften

Chemical ClassesMetals -> Phosphates, Metallic Salts

Cosmetics · 2 Einträge

Cosmetic ingredients (Calcium Pyrophosphate) -> CIR (Cosmetic Ingredient Review)

Abrasive

pHBetween 5,5 and 7,0 (10 % suspension in water)

Food AdditivesNUTRIENT SUPPLEMENT -> FDA Substance added to food

Density3.09

Color/Form · 2 Einträge

Polymorphous crystals or powder

White powder

Physikochemische Eigenschaften

Schmelzpunkt: 1230 °C · 1230 °C
Dichte: 3.09 g/mL · 3.09 g/mL at 25 °C(lit.)
Löslichkeit: 2 O: · H2O: insoluble(lit.)
Aggregatzustand: Powder
Wichte: 3.09 · 3.09
Farbe: White
Geruch (Odor): 100 % · at 100.00%. odorless
Wasserlöslichkeit: Soluble in hydrochloric acid and nitric acid. Insoluble in water.
Kosmetik-Inhaltsstoffe Funktionen: ABRASIVEORAL CARELIGHT STABILIZER
InChI: 1S/2Ca.H4O7P2/c;;1-8(2,3)7-9(4,5)6/h;;(H2,1,2,3)(H2,4,5,6)/q2*+2;/p-4
InChIKey: JUNWLZAGQLJVLR-UHFFFAOYSA-J
SMILES: [Ca++].[Ca++].[O-]P([O-])(=O)OP([O-])([O-])=O
LogP: -3.42 · -3.420 (est)
CAS Datenbank: 7790 · 7790-76-3(CAS DataBase Reference)
EPA chemische Informationen: Diphosphoric acid, calcium salt (1:2) (7790-76-3)

Sicherheit und Regulatorisches

GHS-Klassifizierung

GHS Classification · 5 Einträge

This chemical does not meet GHS hazard criteria for 20.4% (11 of 54) of reports.

Warning

H315 (79.6%): Causes skin irritation [Warning Skin corrosion/irritation]

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)

Aggregated GHS information provided per 54 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Gefahrenhinweise

Regulatory Information · 4 Einträge

Chemical: Diphosphoric acid, calcium salt (1:2)

Diphosphoric acid, calcium salt (1:2) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Diphosphoric acid, calcium salt (1:2) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Status: Active Update: 08-02-2018 https://echa.europa.eu/registration-dossier/-/registered-dossier/20286

Diphosphoric acid, calcium salt (1:2): Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.

Other Safety InformationIMAP assessments - Diphosphoric acid, calcium salt (1:2): Human health tier I assessment

Hazards SummaryMay cause irritation; [MSDSonline] See Calcium.

FDA Requirements · 2 Einträge

Calcium pyrophosphate used as a nutrient is generally recognized as safe when used in accordance with good manufacturing practice.

Calcium pyrophosphate used as a nutrient and/or dietary supplement is generally recognized as safe when used in accordance with good manufacturing or feeding practice.

Hazard Classes and CategoriesSkin Irrit. 2 (79.6%)

Sicherheit und Schutzausrüstung

Disposal Methods · 1 Eintrag

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Toxikologische Informationen

Toxicity Summary · 2 Einträge

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...Calcium Pyrophosphate...

Safe for use in cosmetics, with qualifications

RAIS Toxicity Values · 4 Einträge

48.6

PPRTV Archive

1.95

PPRTV Current

EPA Provisional Peer-Reviewed Toxicity Values · 5 Einträge

Calcium pyrophosphate

8 mg/kg-day

PDF Document

Inadequate information to assess carcinogenic potential

2021

Regulatorische Informationen

FDA Requirements · 2 Einträge

Calcium pyrophosphate used as a nutrient is generally recognized as safe when used in accordance with good manufacturing practice.

Calcium pyrophosphate used as a nutrient and/or dietary supplement is generally recognized as safe when used in accordance with good manufacturing or feeding practice.

Sicherheitsdaten

wgk: 3
tsca: TSCA listed
hs_code: 28353100
risk_code: 36/37/38
hazard_code: Xi
safety_code: 26-36
Speicherklasse: 11 - Combustible Solids
Giftige Stoffe Daten: 7790-76-3(Hazardous Substances Data)

Chemie und Industrie

Verwendung und Herstellung

Uses · 6 Einträge

CIR ingredient: Calcium Pyrophosphate

Used as a fertilizer, dietary and feed supplement, and mild abrasive for metal polishing; Also used in dentifrices, dental abrasives, ceramic ware, china, glass, and phosphors; [HSDB]

Abrasive Blasting [Category: Clean]

Abrasive; fertilizer; feed supplement; in dentifrices, ceramic ware, china, glass, phosphors

Mild abrasive for metal polishing; nutrient and dietary supplement.

Used primarily as dental abrasives in fluoride-containing toothpastes.

U.S. Production2023: 5,000,000 - <10,000,000 lb

Industry UsesAbrasives

Methods of Manufacturing... By ignition of CaHPO4: St Pierre, J Am Chem SOC 77, 2197 (1955).

Formulations/PreparationsGrade: FCC

Household ProductsInformation on 8 consumer products that contain Calcium Pyrophosphate in the following categories is provided:

Anwendungen · 2 Einträge

BeschreibungCalcium pyrophosphate has the molecular formula of Ca2P2O7 and the molecular weight of 254.1378 g/mol. It has the CAS number of 7790-76-3. It may be prepared by the solid-state reaction of the dibasic orthophosphate, or alternately by the precipitation of a soluble Ca salt with aqueous pyrophosphoric acid: 2CaHPO4 + heat Ca2P2O7 +H2O CaCl2 (aq) +H4P2O7 (aq) Ca2P2O7 (solid) + 2HCl (aq) The solid-state reaction produces an amorphous crystal at 240–500°C. b-Ca2P2O7 forms >750°C and a-Ca2P2O7 forms in the temperature range of 1140 to 1350°C. The free energy of formation, △Gf=-3132 kcal/mol. The product of the aqueous method is the dihydrate, Ca2P2O7·2H2O. It is a white powder and has the CAS number of 7790-76-3. It is insoluble in water but soluble in dilute acids. The anhydrate decomposes at 1353°C to form a metaphosphate: Ca2P2O7 + heat Ca(PO3)2 + CaOCalcium pyrophosphate is dimorphic. The phase transformation and sintering behaviors of Ca2P2O7 with different phase composition has been investigated by using X-ray powder diffraction (XRD), dilatometery and SEM techniques. It was found that although α-Ca2P2O7 (high-temperature form) could be maintained during its cooling process, it was metastable and retransformed into β-Ca2P2O7 (low-temperature form) at about 950 °C during its reheating process.

VerwendenCalcium Pyrophosphate is a nutrient and dietary supplement that exists as a white odorless powder, insoluble in water. it is used in dental impression materials and as a buffer.