Spec sheet, SDS and COA: what each polymer document tells you
Three documents travel with every bag of polyelectrolyte. Here is what each one is for, and which one to ask for when.
Three papers, three questions
Buyers often treat the specification sheet, the safety data sheet and the certificate of analysis as one bundle. They answer different questions. The spec sheet says what the grade is meant to be. The SDS says how to handle it safely. The COA says what a particular batch actually measured.
The specification sheet
This is the grade's identity card: ionic character, molecular weight band, charge density, solid content, bulk density, pH of a standard solution, viscosity, the working and maximum concentrations, shelf life and pack size.
Use it when you compare grades, write a purchase specification or set up a tender. Every Sun Brand grade has one on the quality and documents page.
The safety data sheet (SDS)
An SDS follows a fixed 16-section layout: identification, hazards, composition, first aid, fire fighting, spill measures, handling and storage, exposure controls, physical properties, stability, toxicology, ecology, disposal, transport, regulations and other information.
Keep it where the polymer is stored and mixed, not in a purchase file. Operators and safety officers should be able to reach it in a minute.
The certificate of analysis (COA)
A COA belongs to one batch. It lists the tests run on that lot and the results next to the specification limits. If a delivery behaves differently from the last one, the COA is the first thing to check.
Ask for it with each supply if your quality system or a customer audit needs batch traceability. Suraj Chemicals provides a COA per batch on request.
A quick rule
Choosing a grade: read the spec sheet. Training operators: use the SDS. Accepting a delivery: match the COA to the spec sheet and the bag label.
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Send us a one-litre sample or describe your process. We test it in our lab free of charge and recommend a grade and starting dose, and quote within 1 business hour.