Product Overview
Disodium Hydrogen Phosphate is a professional plating salt supplied by QLQ for zipper, hardware and metal-finishing plants. Standard packing: 25KG/BAG. Regular supply for customers in Bangladesh, Pakistan, India and other markets, with export-standard packing and documentation.
Product Identity (Encyclopaedia Card)
| Property | Value |
|---|
| Chemical name | Disodium Hydrogen Phosphate |
| Chemical formula | Na2HPO4 |
| CAS number | 7558-79-4 |
| Appearance | White powder or granules |
| Grade / type | Anhydrous, technical |
| Standard packing | 25 kg PP woven bag or kraft paper bag with PE inner liner; 25 kg fibre drum |
What it is and what it does. Disodium hydrogen phosphate is the buffering and chelating salt used in mildly alkaline cleaning formulations and as a corrosion inhibitor in rinse water.
- White powder; it holds the pH around 9 in solution, which makes it useful in mild cleaners.
- Provides phosphate alkalinity without the aggressive attack of caustic on aluminium or zinc.
- Often used together with a surfactant as a spray-cleaner base.
Typical Use in a Plating / Finishing Line
| Item | Typical guidance |
|---|
| Mild alkaline cleaner | 10-30 g/L |
| Rinse-water inhibitor | A few g/L to reduce flash rust on steel between stages |
| Analysis | pH and phosphate titration |
Safety, Handling & Storage
| Item | Requirement |
|---|
| Hazard classification | Corrosive (GHS05) — causes severe skin burns and eye damage |
| Personal protective equipment | Face shield + goggles, alkali-resistant gloves, rubber apron; avoid dust generation |
| Spill / first aid | Sweep or vacuum dry powder; dilute and neutralise liquid spills with dilute acid, then collect |
| Storage | Dry sealed store, off the floor, away from acids, aluminium, zinc and organic materials; keep bags closed to avoid caking and carbonation |
| Transport | Classified and packed according to IATA/IMDG for the hazard class; UN number and packing group stated on the shipping documents |
Quality Documents Shipped With Every Batch
| Document | Comment |
|---|
| COA (certificate of analysis) | Provided with the shipment; batch traceable to the production date |
| MSDS (safety data sheet) | Provided with the shipment; batch traceable to the production date |
| Packing list | Provided with the shipment; batch traceable to the production date |
| Commercial invoice | Provided with the shipment; batch traceable to the production date |
| Certificate of origin on request | Provided with the shipment; batch traceable to the production date |
Buyer Questions We Answer Every Week
| Question | Answer |
|---|
| Can it be used on aluminium? | Yes - it is far gentler on aluminium than sodium hydroxide, and it is a common choice for aluminium cleaners. |
| Is it a buffer on its own? | It is one of the usual buffer pairs; a blend with the monosodium phosphate gives a flatter pH curve. |
| Product Name | Disodium Hydrogen Phosphate |
| Category | Plating Salt |
| Standard Packing | 25KG/BAG |
| Net Weight | 25 KG per bag |
| Appearance | White to off-white crystalline powder or granules |
| MOQ | 1 drum / 1 bag |
| Delivery | 7-15 days after payment confirmation |
Key Specifications
| Item | Value |
|---|
| Purity / Assay | Industrial grade, COA available on request |
| Packaging Material | Woven bag with PE liner |
| Shelf Life | 12 months in sealed original packing |
| Origin | China |
| Documents | COA, MSDS, packing list, commercial invoice |
Packing & Storage
| Condition | Requirement |
|---|
| Temperature | 5-35 °C, away from direct sunlight |
| Humidity | Dry, ventilated warehouse; keep sealed against moisture |
| Stacking | Max 4 layers for drums, follow pallet markings for bags |
| Shelf Check | FEFO - first expired, first out |
Precautions
- Wear chemical-resistant gloves and safety goggles when handling
- Read MSDS before first use; keep away from incompatible materials
- Spill: collect with inert absorbent, do not wash into drains
- Store locked, out of reach of untrained personnel
FAQ
| Question | Answer |
|---|
| Can you provide COA / MSDS? | Yes, COA and MSDS are provided with every shipment. |
| What is the MOQ? | MOQ is 1 bag / 1 drum. Mixed loading of different chemicals is accepted. |
| Do you provide dosing guidance? | Yes, QLQ engineers provide free bath set-up and dosing consultation based on Hull-cell results. |
| How about shipping? | 7-15 days by sea or air depending on quantity and destination port. |
What Would You Like to Solve?
QLQ supplies the full line — equipment, chemistry and the working documents that make them run — to hardware and zipper factories in 60+ global markets. Contact us to discuss your application, or explore the complete solutions.
