Professional Zinc Alloy Surface Finishing Solutions
HEDP
HEDP
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Shipping & lead time: contact us for a quote. Packing and delivery terms depend on the product and destination.
Product description
Shipping & Return
Product Overview
HEDP 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 | HEDP |
| Chemical formula | C2H8O7P2 |
| CAS number | 2809-21-4 |
| Appearance | Colourless to pale yellow clear liquid (usually 60% solution) |
| Grade / type | 60% aqueous solution |
| Standard packing | 25 L HDPE jerry can; 200 L plastic drum |
What it is and what it does. HEDP is a phosphonate chelant and scale inhibitor, used to keep hardness salts and metal hydroxides in solution in cleaners, in rinse water and in circulating plating-line water.
- Supplied as a 60% clear aqueous solution, weakly acidic.
- Extremely stable against hydrolysis at high temperature and pH - more so than polyphosphates.
- Used at a few g/L, where its strength is quoted either as active acid or as product - always confirm which basis the specification uses.
Typical Use in a Plating / Finishing Line
| Item | Typical guidance |
|---|---|
| Scale control in rinse water | 1-10 mg/L as active acid |
| Cleaner formulations | 1-5 g/L |
| Effluent and cooling water | As specified by the water treatment programme |
Safety, Handling & Storage
| Item | Requirement |
|---|---|
| Hazard classification | Irritant (GHS07) — causes serious eye irritation |
| Personal protective equipment | Safety goggles and acid-resistant gloves; dust mask when handling powder |
| Spill / first aid | Sweep up dry powder, or dilute and neutralise small liquid spills, then rinse to the effluent treatment system |
| Storage | Cool, dry, ventilated store; keep sealed against moisture, away from alkalis and oxidisers |
| 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 |
|---|---|
| What is the difference between HEDP acid and the sodium salts? | The salts are neutralised versions with the same chelating power but a gentler pH; choose according to the formulation pH you need. |
| How should it be stored? | In sealed plastic drums between 5 and 35 C; the material can crystallise if stored cold and redissolves on warming. |
| Product Name | HEDP |
| 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. |
Related Reading
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.
Shipping cost is based on weight. Just add products to your cart and use the Shipping Calculator to see the shipping price.We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.
Specifying HEDP for your line
Send the four details below and we confirm fit, packing and price the same working day.
- Application: which tank or process it serves.
- Dimensions or capacity: drawing preferred.
- Material: where it contacts chemicals or heat.
- Quantity: first order and expected annual use.
| What you send | What you get back |
|---|---|
| Part drawing or sample | Compatibility check and recommended settings |
| Output target per shift | Capacity, tank or rack count, manpower |
| Finish spec with tolerance | Control points and acceptance tests |
| Site conditions (power, water, space) | Layout proposal and utility requirements |
Buying questions we answer most
What is the minimum order quantity?
One carton or one unit for most items. Trial quantities are quoted separately from production volumes.
Can it be customised?
Dimensions, material and surface treatment can be adapted. Send a drawing or a sample and we confirm what changes and what stays standard.
What is the lead time?
Stock items ship within a week of confirmation; made-to-order items typically 20-35 days.
What documentation comes with the shipment?
Packing list, material certificate where applicable, and export documents prepared per destination.
Put HEDP into a process
- Process overview - how each stage connects
- Plating workshop - rack and barrel line layout
- Painting workshop - spray, cure and colour control
- Product overview - what else the line needs
