Buying solvents looks simple — until a drum of off-spec material stops a production line, or a tanker arrives with paperwork that fails an audit. This checklist covers what a purchase manager should verify before ordering, on the invoice, on the drum, on the truck, and at the gate. It applies whether you buy fresh or recovered grades.

1. Before ordering: verify the supplier

GST registration. Confirm the GSTIN is active and matches the entity you are dealing with. A mismatch between the quoting entity and the invoicing entity is the classic red flag.
Regulatory standing. For recovered solvents, the supply chain should trace back to a recovery unit authorized by the State Pollution Control Board (MPCB in Maharashtra, GPCB in Gujarat). Ask how the material is sourced; a good supplier answers precisely.
Sample first. For a new supplier or a new grade, test a sample or a single drum against your process before committing to volume.

2. The invoice: GST done right

Tax invoice, not a kachcha bill. Insist on a proper GST tax invoice. Most industrial solvents are organic chemicals under HSN Chapter 29 and attract 18% GST; the invoice should show the HSN code, taxable value and tax broken out.
Why it matters beyond tax. A proper invoice is your input tax credit, your proof of legitimate sourcing, and the document that ties the material on your floor to a traceable supply chain. Cash deals without invoices save the seller tax and cost you the audit trail.
E-way bill. For consignments above the threshold value, the goods should move with an e-way bill matching the invoice.

3. The COA: read it, don't file it

Every solvent lot should arrive with a certificate of analysis (COA). The parameters worth checking against your specification:

Assay / purity (% of the named solvent)
Moisture / water content — critical for moisture-sensitive processes
Density / specific gravity — a quick identity check you can repeat at your gate
Colour (typically APHA/Pt-Co scale) — a proxy for contamination
Non-volatile residue — what stays behind when the solvent evaporates

Match the COA to the batch or lot number on the drums, not just to the product name. A COA that references no lot is a brochure, not a certificate.

4. Packaging and labelling

Solvents are flammable, volatile, or both. On delivery, check:

Sound containers — sealed drums (typically MS or HDPE, as appropriate to the solvent) or a dedicated tanker; no dents at seams, no weeping bungs, no repainted mystery drums.
Labels — product name, supplier, lot number and hazard marking on every container. Unlabelled drums are unacceptable for hazardous chemicals, full stop.
Safety data sheet (SDS). Your stores and safety teams need the SDS for storage classification, PPE and spill response. Ask for it with the first supply of any product.

5. Transport compliance

Hazardous chemicals on Indian roads are governed by the Central Motor Vehicles Rules, 1989. For a solvent consignment, the visible signs of a compliant transporter:

Hazard class labels and an Emergency Information Panel displayed on the vehicle, naming the goods and the UN class.
A TREM card (Transport Emergency Card) in the driver's cabin — written emergency instructions for the specific cargo.
A driver trained for hazardous goods transport, as the rules require.

Why should a buyer care? Because an accident en route involves your named consignment, and because a supplier careless with transport is rarely careful with quality. Compliant transport is a cheap, visible proxy for a serious supplier.

6. At the gate: receiving checks

Count and weigh. Verify quantity against the invoice — weighbridge for tankers, drum count and tare checks for packed material.
Identity check. A quick density measurement catches gross substitution in minutes.
Retain a sample. Keep a sealed retention sample of each lot until the material is consumed without issue. It settles quality disputes in your favour.
File the set. Invoice, e-way bill, COA, SDS and delivery challan together, per lot. Five minutes of filing beats five weeks of dispute.

The one-line version

Verified supplier, proper GST invoice with HSN code, lot-matched COA, labelled and sound packaging, compliant transport, and a retention sample at the gate. A supplier who meets all six without being chased is a supplier you can scale with.

VC Solutions supplies fresh and recovered industrial solvents — Toluene, MDC, IPA, Ethyl Acetate and more — across Maharashtra and Gujarat with full documentation as standard. Get a quote.

Frequently asked questions

What GST rate applies to industrial solvents?

Most industrial solvents are organic chemicals under HSN Chapter 29 and attract 18% GST under the current two-slab structure. Confirm the specific HSN code and rate for your product on the invoice — and treat any supplier offering to skip the invoice as a risk, not a discount.

Is a COA really necessary for every lot?

Yes, and it should reference the lot number. Solvent quality varies between batches — especially moisture. The COA is your acceptance basis; without it you have no contractual ground to reject off-spec material.

What is the difference between an SDS and a COA?

The COA describes one specific lot (its measured purity, moisture and so on). The SDS describes the product in general — hazards, handling, storage, first aid. You need the COA per lot and the SDS per product.

Do these checks apply to recovered solvents too?

Exactly the same checks apply, plus one more: the supply chain should trace back to an authorized recovery unit. A recovered grade with a lot-matched COA that meets your spec is judged the same way as fresh material — by its numbers.

Buying Industrial Solvents in India: A Purchase Manager's Checklist