What Is Zinc Chloride? Uses, Grades and Bulk Sourcing Guide
Zinc chloride is one of those chemicals that shows up in far more industries than its name suggests. Galvanizing plants use it, battery makers use it, textile mills use it, and oilfield services companies use it for entirely different reasons — which is exactly why sourcing the right grade matters. Buy the wrong purity level and you'll either overpay for specs you don't need, or underspec a process that needed the cleaner grade.
This guide breaks down what zinc chloride actually is, how the 95% and 98% grades differ, where it's used across industry, and how to source it in bulk through BulkFineChem's Zinc Chloride listing.
What Is Zinc Chloride?
Zinc chloride — formula ZnCl₂, CAS 7646-85-7 — is an inorganic salt that's typically supplied as white crystalline granules, flakes or pearls. It's intensely deliquescent, meaning it pulls moisture straight out of the surrounding air, and once it does, it dissolves readily into a clear, highly concentrated solution. That water-hungry nature is actually central to why it's useful: as a flux, a dehydrating agent, and a component in solutions where you need a strong Lewis acid in liquid form.
It's also available pre-dissolved as an aqueous solution at various concentrations, which is how a lot of industrial buyers actually prefer to receive it — no on-site dissolving step, no dust handling, and a more consistent dosing process.
Physical and Chemical Properties
| Property | Value |
|---|---|
| Molecular formula | ZnCl₂ |
| Appearance | White crystalline granules, flakes or pearls |
| Solubility | Highly soluble in water; also soluble in alcohol |
| Hygroscopicity | Strongly deliquescent — absorbs atmospheric moisture readily |
| Chemical nature | Mild Lewis acid; acts as a dehydrating and flux agent |
| Common forms | Anhydrous granules/pearls, flakes, or ready-made aqueous solution |
Zinc Chloride Grades: 95% vs 98%
Not every application needs pharmaceutical-level purity, so most suppliers offer two working grades. Here's roughly how they compare on a typical spec sheet:
| Parameter | 95% Industrial Grade | 98% High Purity |
|---|---|---|
| ZnCl₂ Assay | Min 95.0% | Min 98.0% |
| Iron (Fe) | Max 0.05% | Max 0.001% |
| Sulfate (SO₄²⁻) | Max 0.05% | Max 0.01% |
| Water insoluble matter | Max 0.1% | Max 0.05% |
| Heavy metals (as Pb) | Max 0.05% | Max 0.002% |
The 95% grade is the workhorse for most flux, drilling and general industrial applications. The 98% grade earns its premium in battery electrolytes, precision metal treatment and anywhere trace-metal contamination could actually affect the end product. Always confirm which grade a quoted price refers to — this is the single most common mix-up we see buyers run into.
Industrial Uses and Applications
Metal Processing and Galvanizing
Zinc chloride acts as a flux in hot-dip galvanizing, cleaning the steel surface and improving zinc-coating adhesion. Without a proper flux step, you end up with patchy, poorly bonded coatings — which is exactly the failure mode galvanizers are trying to avoid.
Battery Manufacturing
It's a long-standing electrolyte component in dry-cell (Leclanché-type) batteries, valued for its ionic conductivity and relatively low cost compared to more exotic electrolyte salts.
Oil and Gas
In drilling operations, zinc chloride solutions are used to stabilize drilling clays and, in some processes, to help remove sulfur compounds from crude streams — a niche but genuinely important use in upstream operations.
Textiles and Dyeing
It's used to fix dyes onto fabric and improve fiber quality during finishing, particularly where a mordant-type chemical is needed to help color bond permanently to the material.
- Flux for galvanizing and soldering applications
- Electrolyte in dry-cell battery manufacturing
- Drilling fluid stabilizer and desulfurization aid in oil & gas
- Dye-fixing agent and fiber-quality enhancer in textile processing
- Water treatment coagulant in specific industrial effluent processes
- Wood preservation treatments in some regional applications
Handling, Storage and Safety
Because it's so deliquescent, storage is really the whole ballgame here. Leave a bag of zinc chloride flakes open in humid weather and you'll come back to a caked, half-dissolved mess.
- Store in sealed, moisture-proof packaging in a cool, dry warehouse
- It's corrosive to skin and eyes in concentrated form — gloves and goggles are standard PPE
- Avoid contact with strong oxidizers during storage
- Request the current SDS from your supplier before first handling, and keep it on file for site EHS records
- For solution-form supply, verify the concentration and packaging (drums vs. IBC) matches your dosing equipment
How to Source Zinc Chloride in Bulk from BulkFineChem
BulkFineChem serves manufacturers, formulators, traders and institutional buyers on a strict B2B basis. Here's the ordering flow:
- Enquiry: Specify your required grade (95% or 98%), form (flakes, granules or solution), quantity and delivery location via the product page or the Quick Order form.
- Quotation: A formal quote is issued against your MOQ and packaging preference.
- Advance payment: Orders are confirmed with 50–100% advance payment.
- Dispatch: Delivered pan-India with a GST tax invoice, batch-wise Certificate of Analysis, and TDS/SDS on request. Larger consignments are covered by an e-way bill.
Need pricing fast? The Quick Order page is the shortest path to a quotation.
FAQs About Zinc Chloride
What's the difference between zinc chloride flakes and the solution form?
Flakes are the solid, deliquescent form that you'd dissolve on-site if needed. The solution form is pre-dissolved at a set concentration, which saves a handling step and gives more consistent dosing — many industrial buyers prefer it for exactly that reason.
Which grade do I need for battery manufacturing?
Most battery electrolyte applications call for the higher-purity 98% grade, since trace iron and heavy-metal content can affect cell performance. Confirm the exact spec against your process requirements before ordering.
Why is zinc chloride used as a flux in galvanizing?
It cleans the steel surface of oxides and residues right before the zinc coating is applied, which is what lets the zinc bond evenly instead of flaking off in patches.
Is zinc chloride hazardous to handle?
In concentrated solid or solution form, yes — it's corrosive to skin and eyes. Standard PPE (gloves, goggles) and proper ventilation are recommended, and the SDS should be reviewed before first use.
What packaging options are available for bulk orders?
This depends on the form and quantity ordered — solids are typically supplied in sealed, moisture-proof bags, while solution form ships in drums or larger containers. Confirm exact options when you request your quotation.
Do you supply a Certificate of Analysis with every order?
Yes, every batch dispatched includes a CoA, with TDS/SDS available on request alongside your GST invoice.
The Bottom Line
Zinc chloride's versatility is genuinely unusual — few industrial chemicals span galvanizing, batteries, textiles and oilfield operations all at once. The part that actually trips buyers up isn't the chemistry, it's picking the right grade and form for the job at hand.
Browse current specs and packaging on the Zinc Chloride product page, or head to Quick Order to request your bulk quotation.