Trisodium phosphate

Synonym(s):Sodium orthophosphate;Trisodium phosphate

CAS NO.：7601-54-9
Empirical Formula: Na3O4P
Molecular Weight: 163.940671
MDL number: MFCD00003510
EINECS: 231-509-8
SAFETY DATA SHEET (SDS)
Update Date: 2025-09-25 17:15:13

What is Trisodium phosphate?

Definition

ChEBI: Trisodium phosphate is a sodium phosphate.

Description

Trisodium phosphate (TSP) is the inorganic compound with the chemical formula Na3PO4. It is a white, granular or crystalline solid, highly soluble in water producing an alkaline solution. TSPs are used as cleaning agent, lubricant, food additive, stain remover and degreaser.
Most often found in White powder form, it can also be called trisodium orthophosphate or simply sodium phosphate.

Use

TSPs are used as cleaning agent, lubricant, food additive, stain remover and degreaser.The item of commerce is often partially hydrated and may range from anhydrous Na3PO4, to the dodecahydrate, Na3PO4·12 H2O.

Properties of Trisodium phosphate

Melting point:	1340°C
Density	2.536 g/cm3(Temp: 17.5 °C)
vapor pressure	0Pa at 20℃
storage temp.	Inert atmosphere,Room Temperature
solubility	H2O: slightly soluble(lit.)
form	Powder
color	White
PH	10.95(1 mM solution);11.71(10 mM solution);12.12(100 mM solution)
Odor	at 100.00?%. odorless
Water Solubility	Soluble in water. Insoluble in ethanol and carbon disulfide.
Sensitive	Hygroscopic
Merck	14,8662
Dielectric constant	1.6（Ambient）
InChI	InChI=1S/3Na.H3O4P/c;;;1-5(2,3)4/h;;;(H3,1,2,3,4)/q3*+1;/p-3
CAS DataBase Reference	7601-54-9(CAS DataBase Reference)
EPA Substance Registry System	Trisodium phosphate (7601-54-9)

Safety information for Trisodium phosphate

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.