🧽 Introduction: Why Every Powerful Detergent Needs STPP
Whether it’s a household washing powder or an industrial laundry formulation, cleaning performance begins with chemistry. One of the most vital compounds behind stain removal and water softening is Sodium Tripolyphosphate, widely known as STPP.
From helping detergents work effectively in hard water areas to boosting foam and keeping dirt suspended in solution, STPP is a multi-functional backbone of modern cleaning science.
At Vinipul Chemicals Pvt. Ltd., we supply high-purity STPP in both food-grade and industrial-grade variants, manufactured under strict ISO and GMP protocols.
🧪 What is Sodium Tripolyphosphate (STPP)?
Chemical Formula: Na₅P₃O₁₀
CAS No.: 7758-29-4
Form: White crystalline powder
Solubility: Highly soluble in water
Grade: Available in Detergent, Food, and Technical Grade
STPP is a polyphosphate compound made by reacting sodium carbonate with phosphoric acid under controlled heat and pressure. In detergent applications, it acts as a sequestrant, water softener, dispersant, and pH buffer, making it one of the most versatile ingredients in the formulation toolbox.
🔬 How STPP Works in Detergent Formulations
Here’s how sodium tripolyphosphate supports multi-level cleaning:
1️⃣ Water Softening Agent
Hard water contains calcium (Ca²⁺) and magnesium (Mg²⁺) ions that interfere with surfactant performance.
STPP binds with these ions, preventing them from reacting with the detergent and forming insoluble scum.
Result:
✅ Better foam
✅ Improved surfactant efficiency
✅ Cleaner wash output, especially in hard water zones
2️⃣ Dirt Suspension
Once dirt is lifted from fabric or surfaces, STPP prevents re-deposition by dispersing the particles in the wash solution.
Used In:
- Laundry powders
- Floor cleaners
- Dishwashing detergents
3️⃣ pH Buffering & Emulsification
STPP stabilizes the alkaline pH required for cleaning and helps emulsify oily soils, making it ideal for both greasy and particulate stains.
4️⃣ Enhances Powder Stability & Shelf Life
It also acts as an anti-caking agent in powder detergents, improving flowability and long-term shelf life under humid conditions.
🧼 Industrial & Household Detergent Applications
| Segment | Role of STPP in Formula |
|---|---|
| Laundry Powders | Water softening, anti-redeposition, whitening aid |
| Industrial Textile Cleaners | Boosts cleaning in hard/groundwater |
| Dishwasher Detergents | Emulsifies grease, prevents spotting on dishes |
| Multipurpose Cleaners | Improves surfactant wetting, supports alkaline pH |
| Institutional & Hotel Cleaning | Softens rinse water, boosts stain removal |
| Toilet & Floor Cleaners | Dirt breakup, improved wetting and rinse-off |
📊 Technical Specifications – Vinipul STPP for Detergents
| Parameter | Specification |
|---|---|
| Product Name | Sodium Tripolyphosphate (STPP) |
| Appearance | White crystalline powder |
| Purity (as Na₅P₃O₁₀) | ≥ 94% |
| pH (1% solution) | 9.2 – 10.0 |
| Water Solubility | Complete |
| Moisture Content | ≤ 0.7% |
| Bulk Density | 0.85 – 1.05 g/cm³ |
| Insoluble Matter | ≤ 0.1% |
| Grade Options | Detergent Grade / Technical Grade |
| Packaging | 25kg HDPE bags / Custom Jumbo packs |
🌍 Global Supply & Export Coverage by Vinipul Chemicals
Vinipul Chemicals Pvt. Ltd., based in Mumbai, India, is a trusted bulk supplier of Sodium Tripolyphosphate (STPP) to over 20+ countries including:
- Middle East – UAE, Qatar, Saudi Arabia (laundry detergent plants)
- Africa – Kenya, Egypt, Nigeria (household and multipurpose cleaners)
- Asia-Pacific – Vietnam, Indonesia, Thailand (industrial laundry and dish care)
- South Asia – Bangladesh, Nepal, Sri Lanka (floor and fabric cleaning sectors)
✅ All orders include:
- COA (Certificate of Analysis)
- MSDS and SDS
- Batch-level traceability
- SGS / Intertek QC (on request)
- Rapid export clearance via Nhava Sheva Port (JNPT), Mumbai
📦 Packaging Options
| Format | Details |
|---|---|
| Standard Bags | 25kg / 50kg HDPE with liner |
| Jumbo Bags | 500kg / 1000kg bulk packs |
| OEM Branding | Available for contract manufacturing orders |
| Dispatch Location | Navi Mumbai (Taloja MIDC) |
❓ Buyer FAQs – Optimized for SEO, AEO, and Voice Search
🔹 What is the use of STPP in detergent?
Answer: STPP softens water, suspends dirt, prevents redeposition, and enhances overall cleaning efficiency in both domestic and industrial detergents.
🔹 Is sodium tripolyphosphate safe for home cleaning use?
Answer: Yes. STPP is widely used in detergent powders approved for household laundry, dishwashers, and floor cleaners. It is non-toxic when used as directed.
🔹 Does STPP improve detergent performance in hard water?
Answer: Absolutely. STPP binds calcium and magnesium ions, allowing surfactants to work better even in mineral-rich water.
🔹 What is the pH of STPP?
Answer: A 1% solution of STPP typically has a pH between 9.2 to 10.0, making it suitable for alkaline cleaning formulations.
🔹 Can I buy detergent-grade STPP in bulk for manufacturing?
Answer: Yes. Vinipul Chemicals offers detergent-grade STPP in bulk with consistent purity, fast delivery, and OEM packaging options.
🔹 What is the shelf life of STPP?
Answer: Properly stored in dry conditions, STPP has a shelf life of up to 2 years from the date of manufacture.
Why Choose Vinipul Chemicals Pvt. Ltd.?
🔸 Established Manufacturer & Exporter – Serving India and 20+ countries
🔸 High-Purity STPP – Minimum 94% active content
🔸 Ready Stock & Quick Dispatch – Multiple warehousing facilities
🔸 Custom Packaging & Labeling – Suitable for detergent brands, wholesalers, and exporters
🔸 Certified Operations – ISO, FSSAI, and GMP-compliant
🔸 Support for Distributors & OEM Buyers – Flexible MOQ & long-term pricing
