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Basic Information

Trisodium Phosphate exists in two mainstream commercial forms: Anhydrous TSP and Dodecahydrate TSP. Their alkalinity, solubility, moisture content and application scenarios differ obviously.

Item TSP Anhydrous TSP Dodecahydrate
Full Name Anhydrous Trisodium Phosphate Trisodium Phosphate Dodecahydrate
CAS No. 7601-54-9 7601-54-8
Molecular Formula Na₃PO₄ Na₃PO₄·12H₂O
Molecular Weight 163.94 380.12
Appearance White crystalline powder White transparent granular crystal
Purity (Na₃PO₄) ≥98.0% ≥98.0% (calculated on dry basis)
Moisture Low, non-caking Contains crystal water, easy deliquescence
1% Solution pH 11.5–12.5 11.0–12.0
Solubility Fast water dissolution Easily soluble in cold water
Main Application Focus High-purity food processing, dry blending, stable formulation Meat water retention, seafood processing, general food alkalinity adjustment
Grade Food Grade / Industrial Grade
Standard FCC, E339(iii), GB1886.338
Certifications ISO9001, HALAL, KOSHER

 

Product Overview 

Trisodium Phosphate (TSP) is a strongly alkaline phosphate additive supplied in anhydrous and dodecahydrate forms. Its core functional advantage, different from acidic or neutral phosphates, is alkaline pH regulation in protein-based food systems.

By moderately raising the system pH, TSP changes protein molecular charge distribution, significantly improving water-binding capacity of meat, poultry, and surimi products, reducing cooking loss and maintaining tender and juicy texture.

In processed cheese manufacturing, TSP acts as a classic emulsifying salt to homogenize fat dispersion, stabilize emulsification structure and prevent oil separation.

Anhydrous TSP features low moisture and stable physical state, suitable for dry-mix formulations and high-standard food production. Dodecahydrate TSP dissolves rapidly and performs excellently in water retention and alkalinity adjustment for fresh meat and aquatic product processing.

TSP also provides mild metal ion sequestering performance to reduce food oxidation and discoloration. It can be used in partial industrial water treatment and cleaning fields, and occasionally applied in special pet food as mineral supplementation.

 

Character

TSP is a typical alkaline phosphate salt with stable chemical properties. Compared with MKP’s pH buffering stability, STMP’s cross-linking reaction, and TKPP’s strong chelating capacity, TSP’s irreplaceable feature is active alkaline pH adjustment and protein activation.

Anhydrous TSP shows low hygroscopicity, uniform powder state and long storage stability. Dodecahydrate TSP contains crystal water, dissolves faster in water and delivers more immediate pH lifting effect in wet food processing systems.

Both specifications comply with international food additive safety standards with low heavy metal residues and high purity.

 

Main Functions

1.Alkaline pH Regulator (Core Function) Adjust and elevate pH in protein-containing food formulations. It modifies the charge properties of protein molecules to enhance water-binding capacity, reduce cooking loss and maintain tender texture for meat, poultry and surimi products. It also serves as emulsifying salt for processed cheese to achieve uniform fat emulsification.

2.Moisture Retention Agent Boost water holding capacity of protein-rich food systems, minimize moisture loss during thermal processing.

3.Emulsifying Salt for Dairy Promote homogeneous dispersion of fat in processed cheese, stabilize the cheese matrix and avoid oil separation.

4.Sequestering Agent:  Bind trace metal ions to reduce oxidation and discoloration in food systems.

 

Applications

1. Food Industry 

Meat, Poultry & Surimi Products: Both anhydrous and dodecahydrate TSP are widely used in frozen meat, prepared meat and fish paste products for pH adjustment and water retention improvement.

Processed Cheese: Anhydrous TSP is more preferred for stable emulsification in standardized cheese production.

General Food Processing: Used in baked foods, canned foods and protein drinks for pH modification and system stabilization.

 

2. Industrial Application: 

Applied in industrial cleaning formulations and water treatment alkalinity adjustment.

 

3. Special Feed

Sparingly used in individual pet food formulas for phosphorus and sodium mineral supply (non-mainstream feed phosphate source).

 

Packaging & Storage

Packaging: 25kg PE lined kraft paper bag, 1000kg bulk jumbo bag, customizable packaging available.

Storage: Store in cool, dry and ventilated warehouse, keep sealed to avoid moisture absorption and contamination.

Shelf Life: 24 months under proper storage conditions.

 
 
Items Specifications
Content 98% MIN
Phosphorus pentoxide (P2O5) 18.3% MIN
Methyl orange alkalinity(Na2O) 15.5-19
Sulphate 0.5% max
Water-insoluble 0.1% max

 

Trisodium phosphate dodecahydrate (TECH GRADE)

Grade

Tech Grade

Standards:

HG/T2517–2009

Formula

NA3PO4.12H20

Molecular weight

380.124

EINECS

231-509-8

CAS number

10101-89-0

Chemical properties

Unit

Typical analysis

Specifications

Na3PO4.12H20

%

98.35

98 MIN

Sulphate(SO4)

%

0.02

0.50 MAX

Chloride (CI)

%

0.21

0.40 MAX

Arsenic(As)

%

0.001

0.005 MAX

Iron(Fe)

%

0.003

0.01 MAX

Water Insoluble

%

0.005

0.10 MAX

pH(10g/LSolution)

/

11.94

11.5-12.5

Appearance

/

Pass

White crystal powder

Product Name: Trisodium phosphate dodecahydrate Other Name: Phosphoric acid,sodium salt,hydrate (1:3:12);Phosphoric acid,trisodium salt,dodecahydrate;Trisodium phosphate dodecahydrate;Trisodium orthophosphate dodecahydrate;Trisodium phosphate (Na3PO4.12H2O);Sodium phosphate (Na3PO4) dodecahydrate;Sodium orthophosphate dodecahydrate;Trisodium phosphate dodecahydrate (Na3PO4.12H2O);Sodium phosphate tribasic dodecahydrate;101056-44-4
CAS No.: 10101-89-0 Molecular Formula: H3O4P.12H2O.3Na
InChIKeys: InChIKey=SZMRYTJVXHPULA-UHFFFAOYSA-N Molecular Weight: 380.124
Exact Mass: 380.05 EC Number: 600-151-8
UNII: B70850QPHR DSSTox ID: DTXSID0049810
HScode: 28352910 Categories: Acidity Regulators

PSA: 206.82 XLogP3: -0.3856
Appearance: Colorless or white Density: 1.62
Melting Point: 75 °C Boiling Point: 158°C at 760 mmHg
Refractive Index: 1.4458 Water Solubility: H2O: 258 g/L (20 °C)
Storage Conditions: Store at RT. Toxicity: 2 g / kg (marmots, oral).”>LD50> 2 g / kg (marmots, oral).

Classification of the substance or mixture

Skin irritation, Category 2

Eye irritation, Category 2

GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Warning

Hazard statement(s)

H315 Causes skin irritation

H319 Causes serious eye irritation

Precautionary statement(s)
Prevention

P264 Wash … thoroughly after handling.

P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…

Response

P302+P352 IF ON SKIN: Wash with plenty of water/…

P321 Specific treatment (see … on this label).

P332+P317 If skin irritation occurs: Get medical help.

P362+P364 Take off contaminated clothing and wash it before reuse.

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Storage

none

Disposal

none

Other hazards which do not result in classification

no data available

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.