Sodium tripolyphosphate

CAS Number: 7758294
Chemical Formula: Na5O10P3
Synonyms:
SODIUM TRIPOLYPHOSPHATE
STPP FG Granular 20G
Food Grade Sodium Tripolyphosphate
Appearance: White Powder
MOQ (Minimum Order Quantity): 1 FCL Full Container Load

Description

Sodium tripolyphosphate is a high-performance detergent additive widely used in detergent manufacturing. It serves four key functions in washing formulations

1. Heavy metal ion chelation

Heavy metal ions present in washing water can bind with detergent molecules to form insoluble salts, weakening or completely eliminating cleaning efficiency. A chelating agent is therefore essential to neutralize these ions. Sodium tripolyphosphate exhibits strong chelating capacity toward heavy metal ions, sequestering them and removing their negative impacts on washing. It also captures metal-containing impurities in soils, aiding soil detachment. It acts as a soap booster and prevents fat precipitation and blooming in bar soaps.

2. Soil peptizing emulsifying and dispersing effects

Many soils include body fluids mainly proteins and fatty materials as well as external sand and dust. Sodium tripolyphosphate swells solubilizes and peptizes protein-based soils, promotes fat emulsification, and disperses solid particulate soils. It provides strong emulsification for oils and greases and helps buffer the pH of soap solutions.

3. Anti-caking property for detergents

Synthetic laundry powders tend to absorb moisture and cake under high humidity, making them inconvenient to use. Sodium tripolyphosphate forms a stable hexahydrate upon water absorption, which remains dry. When included in detergent recipes, it effectively prevents caking caused by moisture and keeps powder products free-flowing and granular.

4. Alkaline buffering for cleaning solutions

Sodium tripolyphosphate provides significant alkaline buffering, maintaining the washing solution at approximately pH 9.4, which supports the removal of acidic soils.

Parameters

Property	Value
Melting point	622 °C
density	2.52 g/cm3 20℃
bulk density	1000kg/m3
vapor pressure	<0.1 hPa 20 °C
refractive index	1.658
storage temp	Storage temperature no restrictions
solubility	H2O may be clear to slightly hazy
form	Powder/Solid
color	White
Odor	Odorless
PH	9.0-10.0 25℃ 1% in H2O
PH Range	9.5 – 10.3 at 1 g/l at 20 °C
Water Solubility	20 g/100 mL 20 ºC
Sensitive	Hygroscopic
Merck	14 8697
Stability	Stable Incompatible with strong oxidizing agents strong acids Hygroscopic
Cosmetics Ingredients Functions	CHELATING BUFFERING
InChI	1S/5Na.H5O10P3/c;;;;;1-11239-137810-12456/h;;;;;H78H2123H2456/q5+1;/p-5
InChIKey	HWGNBUXHKFFFIH-UHFFFAOYSA-I
SMILES	[Na+].[Na+].[Na+].[Na+].[Na+].[O-]P[O-]=OOP[O-]=OOP[O-][O-]=O
LogP	-4.691 est
CAS DataBase Reference	7758294CAS DataBase Reference
EPA Substance Registry System	Sodium tripolyphosphate 7758294

Safety Information

Item	Value
Hazard Codes	Xi
Risk Statements	36/37/38
Safety Statements	26-36-24/25
WGK Germany	1
RTECS	YK4570000
F	3
TSCA	TSCA listed
HS Code	28353110
Storage Class	11 – Combustible Solids
Hazardous Substances Data	7758294Hazardous Substances Data
Toxicity	LD50 orally in rats 6.50 g/kg Smyth

Product Application

Sodium tripolyphosphate is a binder stabilizer and sequestrant that is mildly alkaline with a pH of 10 and moderately soluble in water with a solubility of 15g in 100ml of water at 25°C. It enhances the whipping performance of egg-based angel food cake mixes and meringues. It reduces gelation in juices and canned ham and tenderizes canned peas and lima beans. It acts as a moisture-retaining binder in cured pork safeguards against discoloration and lowers cooking loss in sausage products. In algin-based desserts it serves as a calcium sequestrant. Sodium tripolyphosphate is also known as pentasodium tripolyphosphate and sodium triphosphate.

Fast delivery time

Inventory 2-3 working days New production 7-10 working days.