Industrial Chemicals · Calculate & Specify
Compare chemical offers on an active basis
Offers quoted at different strengths are not comparable per kilogram. This comparator converts each option you enter onto a single active basis using only the values you supply from your own verified documents. It performs arithmetic; it does not judge whether two products are technically equivalent, and it never assumes an assay, a density or a price.
Shared basis
Every option must be entered in the same unit and currency, or the comparison is not valid.
Option A
Enter values taken from the specification, COA or written quotation in front of you.
Option B
Enter values taken from the specification, COA or written quotation in front of you.
Calculated comparison
Nothing is calculated until you enter your own values. This tool holds no supplier prices, assays or densities.
- Option A: Enter the as-supplied quantity from your quotation.
- Option A: Enter the declared active content (% active) from the specification or COA. No value is assumed.
- Option B: Enter the as-supplied quantity from your quotation.
- Option B: Enter the declared active content (% active) from the specification or COA. No value is assumed.
An equal active basis is not technical equivalence
This comparator does not determine whether two products are chemically, technically or application-equivalent. Differences may include chemical identity, grade, impurities, physical form, stabilisers, specification, regulatory or application requirements, and manufacturer formulation. Commercial selection remains your decision.
Use this when
- Two quotations are quoted at different concentrations or in different forms.
- One offer is a dry material and the other is a solution of the same declared active.
- You need the cost per unit of active material rather than per unit as supplied.
- You need to know how much as-supplied product carries a given quantity of active material.
How this works
- 1. Enter each option using values taken from the specification, COA or written quotation in front of you.
- 2. Active material = as-supplied quantity × active fraction.
- 3. Cost per active unit = as-supplied cost ÷ active fraction.
- 4. Compare the calculated figures. Every substitution is displayed so you can check it against your own documents.
What this page does not determine
- Equal active concentration does not prove chemical, technical or application equivalence — identity, grade, impurities, physical form, stabilisers, specification and regulatory requirements can all differ.
- It does not recommend a supplier. It reports which entered option has the lower calculated cost per active unit, where that is mathematically true.
- It does not supply, infer or default any assay, density, price or currency — every value is yours.
- It is not a dosing, mixing or handling tool and produces no process instruction.
- Where actual handling is involved, work from the current SDS, the manufacturer's instructions, your own site procedures and qualified technical or engineering review.
Relevant Allzone products
These are catalogue identities relevant to investigate. A listing here is not a recommendation to use the material in any process, and it is not a suitability, safety or compliance claim.
- Caustic Soda Flakes & PearlsSolid sodium hydroxide supplied at a stated assay; the same chemical is also traded as a solution at a different basis.
- Hydrogen PeroxideTraded at several declared concentrations with stabiliser packages stated on the data sheet.
- Sodium HypochloriteSolution quoted either as % available chlorine or as trade percent — different declared bases.
- Poly Aluminium Chloride (PAC)Declared by Al2O3 content and basicity; two PAC offers at the same trade percent are not the same active basis.
- Citric Acid Anhydrous & MonohydrateTwo distinct hydrate identities; the water of crystallisation changes the active basis per kilogram.
- Sodium PercarbonateSolid supplied with a declared active-oxygen content — the active basis is not the total mass.
Where this comes from, and what it cannot tell you
Standard mass-fraction arithmetic (active mass = mass × mass fraction)
Supports: Converting an as-supplied quantity to an active quantity when both are on the same mass basis.
Limitation: Valid only when the entered fraction is a mass fraction of the same as-supplied material.
Application-independent · Arithmetic identity
Supplier specifications, certificates of analysis and written quotations
Supports: The assay, form, quantity and price values used in the calculation.
Limitation: The tool holds no supplier data. Accuracy depends entirely on the values the user enters.
Per supplier document · Confirm against the current document revision
Related knowledge & tools
- Industrial Chemical Specification & Documentation GuideWhere the assay, basis and grade values you enter here are actually defined and verified.
- Dilution Arithmetic CalculatorConcentration and quantity arithmetic once the basis of each value is established.
- Alkali Selection & Form Comparison GuideWhy the same alkali is traded in solid and solution forms at different bases.
- Industrial Chemicals KnowledgeChoose and compare, learn and specify, calculate.