Why do quotations for the same material differ so widely?

Usually because they are not quotations for the same thing. A price can move on hydrate form, on grade, on packing, on the delivery term, on the quantity that unlocks it, on payment terms, and on how long it stays valid. Any one of those left unstated will be filled in differently by each supplier, in each case in the way that makes the offer look strongest. The spread you are reading is then mostly a spread of assumptions, not of value, and no amount of negotiation afterwards recovers the comparison you failed to set up.

How much detail should an enquiry contain?

Enough that a competent stranger could fill it without calling you, and no more. That means the identity of the material, the quantity and the period, the packing, the delivery term with the named place, the documents required, and the date by which the reply is needed. It does not mean a copy of your internal specification with every historical clause still attached, which invites either an inflated price for irrelevant obligations or a quiet decision to ignore parts of it.

Should a target price be disclosed?

Disclosing a target narrows the replies toward that number and costs you information about what the market can actually do. Disclosing the quantity and the intended period does the opposite: it lets a supplier quote the tier that genuinely applies instead of hedging. The general rule is to be generous with facts about your demand and reserved about your valuation of it.

How many suppliers should be asked?

Enough to see a range, few enough that each reply gets read properly. Sending the same enquiry to a long list usually produces a set of thin answers, because experienced sellers recognise a broadcast and respond in proportion. A short list, each approached with the same structured document and a realistic reply window, produces offers that can be compared line by line and questioned in detail.

What should happen to an offer that arrives in a different format?

Transcribe it into your own comparison sheet rather than reading it in the sender format. The act of transcription is what exposes the gaps, because every empty cell is a question that has to be asked before the offer can be scored. Keep both documents: the original as received, and your normalised line. When a discussion later turns on what was actually offered, the pair of them settles it.

Writing an enquiry that returns comparable quotations

Technical article · Eapearl Chemical · 15 December 2025

A purchasing file with five quotations and no way of ranking them is a common outcome, and it is almost always caused by the enquiry rather than by the suppliers.

Why quotations come back incomparable

Ask three suppliers for a price on a chemical and you will often receive three numbers that cannot be placed side by side. One is for a different hydrate form. One is for a different packing size. One is delivered to your gate and the others are ex works. One holds for a week and another for a quarter. One assumes payment in advance and another offers a term. Each reply is internally honest; together they describe different transactions.

The reason is structural. Every blank left in an enquiry has to be filled by the person answering it, and it will be filled in the way that makes the answer most attractive to send. That is not a criticism of suppliers, it is how quoting works. The remedy is not to police the replies but to remove the blanks, and that work happens before anything goes out.

The identity block: naming the material so it cannot be misread

Identity is where the largest errors hide, because they are invisible until the delivery arrives. Two examples make the point. Citric acid monohydrate and citric acid anhydrous are sold as the same acid, and a price per unit mass compares them unfairly, because part of what is weighed in one of them is water of crystallisation. Similarly, an enquiry for soda ash meets a product family sold under several descriptions with different bulk behaviour, where sodium carbonate as a chemical name and the grade actually wanted are not the same statement.

The identity block should carry, at minimum:

Chemical name in full plus the CAS number, never an abbreviation on its own.
Hydrate or salt form, and the basis on which quantity is being counted.
Grade designation, with the monograph or standard named if one applies in your market.
The critical specification lines only — the few figures your process actually depends on, with limits and, where it matters, the test method.
Physical form: powder, granule, flake, solution and its strength, since these are frequently different products commercially.

Everything else in your internal specification can stay internal until a supplier is shortlisted. An enquiry loaded with legacy clauses either raises the price to cover obligations nobody needs or gets partially ignored, and you will not know which.

The commercial block: what turns a price into an offer

The second half of the enquiry fixes the transaction. State the quantity per delivery and the expected quantity across a named period; the two answer different questions, and a supplier who knows both can offer the tier that genuinely applies rather than hedging against the worst case. State the packing you can actually receive, because a drum price and a bulk price are not convertible by arithmetic once your site cannot discharge bulk.

Name the delivery term together with the place, and say which edition of the trade terms you are applying. A term without a named place is not a term. Say what documents must accompany the goods and which must arrive in advance, because a certificate produced two weeks after arrival may be worthless for your own release. Give the payment terms you are proposing rather than inviting each supplier to propose their own, since payment terms are a price and treating them as one keeps the comparison clean. Finally, state the validity you need and the date by which you want the reply; an offer that expires before your approval cycle finishes is not an offer.

Normalising offers onto a single line

When replies arrive, do not read them in the format they came in. Transcribe each into one row of your own sheet, converting everything to a common basis:

Convert to a common delivery basis by adding the freight, insurance, duty and handling that the seller has not included. An ex-works offer and a delivered offer are not comparable until this is done.
Convert to a common quantity basis, taking account of hydrate form or solution strength so that you are comparing the active material you actually need.
Price the packing difference, including pallet handling, returns and disposal of empties, which is a real cost on some formats and not on others.
Price the payment term as a financing cost over the days involved, so that a longer term is visible as the concession it is.
Add the cost of any testing you will have to perform because the offered documentation is thinner than another supplier proposed.
Note the minimum order quantity and the lead time next to the price, since a lower price at a quantity you cannot store is not a lower price.

Every cell you cannot fill is a question to send back. Sending those questions is not haggling; it is completing the offer so that it can be evaluated, and most suppliers answer such questions readily because a structured buyer is easier to serve.

Asymmetries that make a cheap offer expensive

Some differences never appear in a price column and change the ranking anyway. Who holds the stock, and where, determines how quickly a shortfall can be covered. Whether the seller produces the material or trades it determines who can answer a technical question in one step. Whether change notification is offered determines whether you will hear about a process change before or after it reaches your plant. What happens to a non-conforming lot, and how quickly, determines the cost of the first bad delivery. Ask about each of these in the enquiry rather than discovering them later, and record the answers in the same sheet as the price, because a decision made on price alone is only correct if all of these are equal, and they rarely are.

A workable structure for the document

A good enquiry fits on a page or two: a short header naming the company, the site and the contact; an identity block; a commercial block; a documents block; a reply block that states the format and the deadline. Send the identical document to every supplier on the list and keep a copy in the file. The comparison sheet, the enquiry and the replies then form a record that explains the decision to an auditor, to a colleague and to yourself in a year.

If you would like a quotation built on that structure, send the identity and commercial blocks through our contact page; a reply against a complete enquiry can be specific from the first exchange instead of the third.