Potassium Phosphate, Tribasic

HCID 62657

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Basic information

CAS: 14887-42-4
Standard SMILES: O=P([O-])([O-])[O-].[K+].[K+].[K+]
InChIKey: LWIHDJKSTIGBAC-UHFFFAOYSA-K
Molecular formula: K3O4P
Average molar mass: 212.266 g/mol
Monoisotopic mass: 211.84454015

Overview

Tripotassium phosphate is an inorganic potassium salt that is the tripotassium salt of phosphoric acid. It is an inorganic phosphate salt and an inorganic potassium salt.

Names & identifiers

Preferred name: Potassium Phosphate, Tribasic
IUPAC: tripotassium;phosphate
English name: potassium pentahydrogen bis(phosphate)
Molecular formula: H3O4P.1/2K
Molecular weight: 138.1

Names & synonyms

7778-53-2Tripotassium phosphatePotassium phosphate tribasicTripotassium orthophosphatePhosphoric acid, tripotassium saltPotassium orthophosphatePotassium phosphate, tribasicCaswell No. 700APotassium phosphate (K3PO4)CCRIS 7321tribasic potassium phosphateEINECS 231-907-1

Show more names

Einecs 238-961-5Phosphoric acid, potassium salt (2:1)

Potassium pentahydrogen bis(phosphate)EPA Pesticide Chemical Code 07640716D59922JUPhosphoric acid potassium salt (1:3)Potassium phosphate, anhydrousINS NO.340(III)INS-340(III)DTXSID3043994

Database identifiers

CAS: 14887-42-4、22763-03-7、7778-53-2
PubChem CID: 62657
DTXSID: DTXSID3043994
ChEBI: CHEBI:190301
UNII: 16D59922JU
EC Number: 231-907-1、238-961-5
Nikkaji: J43.943F

Properties

Computed structural properties

Topological polar surface area: 86.3 Å²
Hydrogen bond donors: 0
Hydrogen bond acceptors: 4
Rotatable bonds: 0
Heavy atoms: 8
Formal charge: 0
Complexity: 36.8

Experimental & physicochemical properties

Chemical ClassesMetals -> Phosphates, Metallic Salts

pHBetween 11,5 and 12,3 (1 % solution)

Food AdditivesEMULSIFIER OR EMULSIFIER SALT, PH CONTROL AGENT, STABILIZER OR THICKENER -> FDA Substance added to food

SolubilityFreely soluble in water. Insoluble in ethanol

Food Contact SubstancesFCS -> FDA Inventory of Food Contact Substances Listed in 21 CFR

Physical Description · 4 items

Other Solid

Other Solid; Dry Powder; Liquid

Colourless or white, odourless hygroscopic crystals or granules. Hydrated forms available include the monohydrate and trihydrate

Deliquescent solid; [Merck Index] Colorless or white odorless, hygroscopic solid; [JECFA] White granules; [Alfa Aesar MSDS]

Physicochemical properties

Density: 2.119 · 2.119[at 20℃]
vapor pressure: 0.001 Pa · 0.001Pa at 20℃
Water Solubility: 583 g/L · 583g/L at 20℃
EPA Substance Registry System: Phosphoric acid, potassium salt (2:1) (14887-42-4)
Symbol(GHS): 7 · GHS07
Signal word: Warning
Hazard statements: 319 · H319
Precautionary statements: 264 · P264-P280-P305+P351+P338-P337+P313P
TSCA: TSCA listed
REACH Registrations: Active

Safety & regulation

GHS classification

GHS Classification · 6 items

This chemical does not meet GHS hazard criteria for 3.2% (66 of 2041) of reports.

Danger

H315 (78.1%): Causes skin irritation [Warning Skin corrosion/irritation]

P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P305+P354+P338, P317, 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 2041 reports by companies from 30 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Warning

Hazard information

Regulatory Information · 6 items

Chemical: Phosphoric acid, potassium salt (2:1)

Chemical: Phosphoric acid, tripotassium salt

Phosphoric acid, potassium salt (2:1) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Phosphoric acid, potassium salt (2:1) 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)

Phosphoric acid, potassium salt (1:3) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Phosphoric acid, potassium salt (1:3) 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: 24-01-2018 https://echa.europa.eu/registration-dossier/-/registered-dossier/2187

Status: Active Update: 05-01-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/14686

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

Hazards Summary · 1 item

Maximum tolerated daily intake is 70 mg/kg (as P); [JECFA] A moderate eye irritant; Causes dermatitis in dermal lethal-dose studies of rabbits; Causes somnolence and GI changes in oral lethal-dose studies of rats; [RTECS] A skin and strong eye irritant; [Alfa Aesar MSDS]

Hazard Classes and Categories · 3 items

Eye Irrit. 2 (95.8%)

Skin Irrit. 2 (78.1%)

Acute toxicity (Oral) - Category 4

Safety & protection

Protective Action Criteria (PAC) · 3 items

13 [mg/m3]

140 [mg/m3]

840 [mg/m3]

Toxicology

RAIS Toxicity Values · 4 items

PPRTV Current

Hazard Quotient Level 0.1 or Cancer Risk Level 1E-06 · 6 items

7.80e+04

1.20e+06

2.00e+04

1.5E+01(G)

1.00e+00

Volatile

Hazard Quotient Level 3 or Cancer Risk Level 1E-04 · 6 items

2.30e+05

3.50e+06

6.00e+04

1.5E+01 (G)

1.00e+00

Volatile

Safety data

tsca: TSCA listed
Signal word: Warning
Symbol(GHS): GHS07
Hazard statements: H319
REACH Registrations: Active
Precautionary statements: P264-P280-P305+P351+P338-P337+P313P

Chemistry & industry

Uses & manufacturing

Uses · 2 items

Used as emulsifier, pH control agent, and stabilizer or thickener in foods; [ExPub: FDA] Used as buffer, sequestrant, and emulsion stabilizer in foods; [JECFA] Formerly used in hospital germicide detergents, (registration cancelled in 1986), liquid bathroom cleansers (cancelled in 1989), and laboratory bactericidal cleansers (cancelled in 1989); [NPIRS]

Using Disinfectants or Biocides [Category: Clean]

U.S. Production · 2 items

2023: 5,000,000 - <10,000,000 lb

2023: 1,000,000 - <2,500,000 lb

Consumer Uses · 2 items

Soil amendments (fertilizers)

Solvent

Industry Uses · 2 items

Soil amendments (fertilizers)

pH regulating agent

Household ProductsInformation on 3 consumer products that contain Potassium phosphate, tribasic in the following categories is provided:

Use Classification · 3 items