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7601-54-9

Supplier Related Products Identification Chemical Properties Safety Data Raw materials And Preparation Products Material Safety Data Sheet(MSDS) Hazard Information Questions and Answers (Q&A) Well-known Reagent Company Product Information

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Identification

Name
Trisodium phosphate
CAS
7601-54-9
Synonyms
BUFFER SOLUTION, PH 2.5
BUFFER SOLUTION, PH 3.0
BUFFER SOLUTION, PH 6.5
BUFFER SOLUTION, PH 7.0
BUFFER SOLUTION, PH 7.5
BUFFER SOLUTION, PH 8.0
BUFFER SOLUTION, PH 8.5
BUFFER SOLUTION, PH 9.0
BUFFER SOLUTION, PH 9.5
DPD PHOSPHATE BUFFER
MILLONIG'S PHOSPHATE BUFFER
SODIUM PHOSPHATE
SODIUM PHOSPHATE BUFFER
SODIUM PHOSPHATE, TRIBASIC
TRI-SODIUM ORTHOPHOSPHATE
TSP
TSPA
TSPC
antisal4
dri-tri
EINECS(EC#)
231-509-8
Molecular Formula
Na3O4P
MDL Number
MFCD00003510
Molecular Weight
163.94
MOL File
7601-54-9.mol

Chemical Properties

Appearance
White crystalline powder
Sensitive 
Hygroscopic
Merck 
14,8662
Uses
sodium phosphate helps maintain product pH.
Uses
Trisodium Phosphate is an emulsifier and buffer that is strongly alkaline, with a ph of 12. it is moderately soluble in water, with a solubility of 14 g/100 ml at 25°c. it functions as an emulsifier in processed cheese to improve texture. it maintains viscosity and pre- vents phase separation in evaporated milk and is also found in cereals. it is also termed trisodium orthophosphate, sodium phosphate tribasic, and trisodium monophosphate.
CAS DataBase Reference
7601-54-9(CAS DataBase Reference)
EPA Substance Registry System
7601-54-9(EPA Substance)

Safety Data

Hazard Codes 
C
Risk Statements 
R34:Causes burns.
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S24/25:Avoid contact with skin and eyes .
RIDADR 
UN 3262 8/PG 3

WGK Germany 
1

RTECS 
TC9490000


34
HS Code 
28352910
Safety Profile
Moderately toxic by intravenous route. Mutation data reported. A strong, caustic material. When heated to decomposition it emits toxic fumes of Na2O and POx. See also PHOSPHATES.
Hazardous Substances Data
7601-54-9(Hazardous Substances Data)

Raw materials And Preparation Products

Material Safety Data Sheet(MSDS)

Hazard Information

Hazard
Toxic by ingestion, irritant to tissue.

Questions and Answers (Q&A)

Chemical Properties
The dodecahydrate is a white or colorless hexagonal crystal; density 1.62 g/cm3 ; melts around 75°C on rapid heating; partially loses water of crystallization at 100°C; retains the last water molecule even at moderate ignition; soluble in water, about 28 g/100 mL at 20°C; the solution is strongly alkaline; the pH of a 0.1M solution 11.5; insoluble in alcohol.
Uses
Trisodium phosphate (TSP) is a cleaning agent, lubricant, food additive, stain remover and degreaser. It is an alkaline cleaning agent that has been used as a household cleaner for many years, but ecological problems have largely ended that practice, at least in the western world. Substitutes are not as effective, but the raw chemical can be bought in bulk to add to other detergents. It works by disrupting the bacterial cell membrane and causing the contents to leak out, though the exact mechanism is not fully elucidated (Oyarzabal, 2005). Trisodium phosphate solutions are approved for treatment of beef carcasses in the US Code of Federal Regulations (21 CFR 182.1778; FDA 2003).
By the end of the 20th century, many products that formerly contained TSP were manufactured with TSP substitutes, which consist mainly of sodium carbonate along with various admixtures of nonionic surfactants and a limited percentage of sodium phosphates. TSP is commonly used after cleaning with mineral spirits in order to remove hydrocarbon residues. TSP may be used with household chlorine bleach in the same solution without hazardous reactions. This mixture is particularly good for removing mildew, but is ineffective at permanently removing mold.
Preparation
Trisodium phosphate may be prepared in two steps, first by adding a little excess of sodium carbonate to phosphoric acid and then boiling the solution to expel carbon dioxide. Sodium hydroxide is then added to the solution:
Na2CO3+ H3PO4→Na2HPO4+ CO2+ H2O
Na2HPO4+ NaOH →Na3PO4+ H2O
Alternatively, trisodium phosphate may be prepared by complete neutralization of phosphoric acid with sodium hydroxide, followed by evaporation and crystallization:
H3PO4+ 3NaOH →Na3PO4+ 3H2O

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