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White Sodium Tripolyphosphate STPP For Antiscale CAS 7758-29-4

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White Sodium Tripolyphosphate STPP For Antiscale CAS 7758-29-4

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CAS : 7758-29-4

EINECS : 231-838-7

Appearance : White particles or powder

Crystalline hydrate : Water-free

Another name : Sodium Triphosphate

Life span : Two years

Available port : Qingdao Port, Tianjin Port, Shanghai Port, Lianyungang Port, Fujian Port, Guangzhou Port

Fusing point : 622℃

Solubility : H2O: may be clear to slightly hazy

Density : 2.52 g/cm³

Storage temperature : Store in a tightly sealed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Avoid moisture.

Brand Name : Riel Chemical

Model Number : 96%

Certification : SGS, ISO9001, CE

Place of Origin : Weifang

MOQ : 20 tons

Price : USD 730～800 FOB

Payment Terms : T/T , L/C

Supply Ability : 50 tons per day

Delivery Time : 3～5 work day

Packaging Details : 25 kg polyethylene woven bag, moisture-proof, easy to transport

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White Sodium Tripolyphosphate STPP For Antiscale CAS 7758-29-4
Product Specifications
Attribute Value
CAS 7758-29-4
EINECS 231-838-7
Appearance White particles or powder
Crystalline hydrate Water-free
Another name Sodium Triphosphate
Life span Two years
Available port Qingdao Port, Tianjin Port, Shanghai Port, Lianyungang Port, Fujian Port, Guangzhou Port
Fusing point 622℃
Solubility H2O: may be clear to slightly hazy
Density 2.52 g/cm³
Storage temperature Store in a tightly sealed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Avoid moisture.
Technical Specifications
Molecular formula: Na5P3O10
Molecular weight: 367.86
Industrial grade: CAS 7758-29-4
Standard: GB/T 9983-2004
Quality Parameters Standard Value
Main content: sodium tripolyphosphate ≥ 96.0%
Phosphorus pentoxide P2O5≤ 57.0%
Water insoluble≤ 0.10%
Iron ≤ 0.007%
Ph Value (1%) 9.2-10.0
Whiteness ≥ 90
White Sodium Tripolyphosphate STPP For Antiscale CAS 7758-29-4
Physical and Chemical Properties
  • Chemical Formula: Na₅P₃O₁₀
  • Molecular Weight: 367.86 g/mol
  • Appearance: White crystalline or powdery solid
  • Form: Typically exists as an anhydrous compound (Na₅P₃O₁₀) or a hexahydrate (Na₅P₃O₁₀*6H₂O)
  • Water Solubility: Highly soluble in water (14 g/100 mL at 20°C, 30 g/100 mL at 60°C)
  • Other Solvent: Insoluble in organic solvents (e.g., ethanol)
  • Aqueous Solution pH: 9.5-10.5 (1% solution)
  • Decomposition Temperature: 622°C (into sodium pyrophosphate and sodium metaphosphate)
  • Hydrate Stability: Hexahydrate tends to effloresce in dry air
  • Hygroscopicity: Strong; easily absorbs moisture from the air
  • Chelating Ability: Forms stable soluble complexes with metal ions (Ca, Mg, Fe)
White Sodium Tripolyphosphate STPP For Antiscale CAS 7758-29-4
Applications of Sodium Tripolyphosphate
Industrial Uses
  • Detergents and Cleaners: Key component in industrial detergents for machinery, equipment, and hard surface cleaning
  • Water Treatment: Scale inhibitor, corrosion inhibitor, and water softening agent
  • Textile Industry: Washing aid, bleaching stabilizer, and dyeing auxiliary
  • Paper Industry: Dispersant and retention agent for improved paper quality
  • Ceramic Industry: Grinding aid and dispersant for ceramic production
  • Metal Processing: Cleaning agent and rust inhibitor
  • Oil Industry: Drilling fluid additive and oil cleaning agent
  • Coatings and Paints: Dispersant and stabilizer
White Sodium Tripolyphosphate STPP For Antiscale CAS 7758-29-4 White Sodium Tripolyphosphate STPP For Antiscale CAS 7758-29-4
Frequently Asked Questions
What is your payment term?
We can accept T/T and L/C at sight as payment term.
Are you able to deliver on time?
Of course! We specialize in this line for many years, with many customers choosing us because we consistently deliver on time while maintaining top quality.
Do you provide free sample?
Yes, we can provide free samples. You only need to cover the express fee.
How about the price? Can you make it cheaper?
We always prioritize customer benefits. Price is negotiable under different conditions, and we assure you the most competitive pricing.
Can I visit your company and factory in China?
Sure. You are very welcome to visit our company in Weifang, China. (We will arrange airport pickup and drop-off at Weifang Airport)
What if there is a quality problem?
We have a professional and comprehensive after-sales service team to promptly address any issues.

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