Glyphosate Acid Equivalent: Compare Product Quotes Correctly

Glyphosate acid equivalent helps importers compare how much glyphosate acid a formulation contains when salt forms and concentrations differ. A lower price per litre does not necessarily mean a lower price for the same declared amount of acid. Before ranking quotations, establish the salt identity, concentration basis, net pack quantity and commercial terms for each offer.

Quick answer: Obtain the confirmed glyphosate acid equivalent in g/L for liquids or g/kg for solids. Convert it to kilograms per selling unit, then divide the price of that unit by its acid content. Use the result as one purchasing comparison, alongside product approval, formulation quality and delivery conditions.

This supplier-owned guide from Averstar is for procurement teams reviewing product offers. Its calculation examples are hypothetical, not current prices, field trial results or instructions for changing application rates. The approved destination-market label governs the actual product's permitted uses.

Separate glyphosate acid from its salt declaration

Glyphosate products can contain different salt forms. The declared mass of the salt includes more than the glyphosate acid portion, so a number described as salt content cannot be assumed to equal acid equivalent. Iowa State University Extension's Glyphosate math explains why acid equivalent provides a consistent basis when comparing glyphosate formulations.

For purchasing, this means a quotation should not stop at “glyphosate SL.” Ask for the complete identity and the acid-equivalent declaration, and retain the supplier's supporting specification. If a quotation and a certificate of analysis use different bases, ask the supplier to reconcile them in writing before your team enters the figures into a price comparison.

Avoid assigning an acid equivalent from a familiar trade description alone. A label such as “41%” or “480 g/L” needs its accompanying definition: what substance is measured, and on what basis? Familiar numbers are not a substitute for the actual formulation documents.

Check concentration units before comparing offers

The distinction between mass and volume matters independently of salt identity. A concentration in g/L states grams per litre of formulation. A concentration in g/kg states grams per kilogram. A percentage by mass states grams per 100 grams; it does not automatically state grams per 100 millilitres.

If a supplier provides 36% by mass as acid equivalent, that is 360 g acid equivalent per kilogram of product. Converting it to g/L requires the formulation density at the stated reference conditions. Ask for that density and its source rather than assuming the liquid has the density of water.

These unit checks belong beside the commercial information. Record whether the invoice is per litre, kilogram, bottle or carton, and whether pack quantity is net content or shipping weight. A carton price cannot be divided by a litre-based concentration until the net volume inside the carton is known.

Work through a glyphosate acid equivalent price example

The following figures are an illustrative purchasing exercise. They describe two imaginary liquid offers with already-confirmed acid equivalents and identical quotation terms. They are not Averstar quotations or claims about particular products in the catalogue.

• Offer A: 360 g/L acid equivalent, quoted at USD 2.40 per litre. Each litre contains 0.360 kg acid equivalent. The calculated comparison is 2.40 divided by 0.360, or approximately USD 6.67 per kg acid equivalent.
• Offer B: 480 g/L acid equivalent, quoted at USD 3.00 per litre. Each litre contains 0.480 kg acid equivalent. The calculated comparison is 3.00 divided by 0.480, or USD 6.25 per kg acid equivalent.

Offer B has the higher litre price but the lower acid-equivalent price in this example. That result is a comparison of declared content and quoted cost. It does not establish identical crop safety, field performance, registration scope, packaging suitability or total cost to the importer.

For a solid formulation, follow the same logic with mass units. A hypothetical product at 680 g/kg acid equivalent contains 0.680 kg acid equivalent per kilogram of product. Divide its price per kilogram of product by 0.680. Do not substitute a salt-content figure or compare a kilogram price directly with a litre price.

Keep the purchasing calculation separate from field decisions

Oklahoma State University Extension's glyphosate formulation guidance distinguishes salt content from acid equivalent and discusses how formulation and application conditions affect use. It provides technical context; it does not authorize a use for an imported product in another jurisdiction.

For a buyer, the practical boundary is clear: cost per kilogram of acid equivalent is not cost per successfully treated hectare. The latter requires the approved use pattern, relevant local conditions and a qualified assessment of expected performance. Do not turn the numerical ratio between two concentrations into instructions for a distributor's customers.

Likewise, a low acid-equivalent price cannot compensate for missing product identification or unresolved approval. Put these issues into a separate decision column so that the cheapest numerical result does not become an automatic purchase recommendation.

Use a consistent quotation worksheet

The following is a suggested commercial worksheet, not a regulatory form. Ask every supplier for the same fields so your team can identify missing information without guessing.

• Product identity: active ingredient, salt form, formulation code and specification revision.
• Declared content: salt content where relevant, acid equivalent, units and whether any percentage is by mass or volume.
• Conversion evidence: density and reference temperature if a mass-to-volume conversion is needed.
• Selling unit: net pack content, packs per carton and the unit to which the quoted price applies.
• Commercial scope: currency, quantity, delivery term, named delivery location, payment basis and quotation validity.
• Document review: product specification, proposed destination label, relevant approval evidence, SDS and batch COA requirements.
• Decision record: calculated acid-equivalent price, unresolved differences and the person responsible for closing each issue.

Keep freight, taxes and local handling on a consistent basis when developing a landed-cost comparison. If these costs remain estimates, label them as estimates and retain the assumptions. Use the pesticide COA review checklist when checking the batch documentation against the agreed specification.

Prepare a product-specific inquiry

Averstar's glyphosate acid 360 g/L SL listing is a starting point for a product inquiry. Ask the team to confirm the exact formulation, salt identity, available documents and commercial configuration for your destination. A catalogue entry is not evidence that the product is approved in every market.

For a useful glyphosate acid equivalent comparison, send the destination country, required formulation, concentration basis, order quantity and packaging request through the contact page. Include any required document list. The team can then assess sourcing and documentation with manufacturing partners and identify points requiring clarification before a formal offer.

Editorial and source note

Prepared on 30 October 2026 by the Averstar Chemical Editorial Team. University sources support the technical distinction between salt content and acid equivalent. The worksheet and numerical examples are editorial purchasing aids; no independent efficacy testing or current price survey is claimed. For corrections or product-specific document requests, contact shi@averstarcn.com.