A matching solution-viscosity number does not fully define a sodium carboxymethyl cellulose grade. Retain degree-of-substitution information and the exact viscosity method as separate parts of the candidate record.
Use the monograph within its scope
The OIV carboxymethylcellulose monograph includes substitution-related characterisation and analytical methods for oenological use. It illustrates that substitution is a separate property. It is not a universal CMC specification or approval for all food and industrial applications.
Ask what the offered product name, chemical form and grade code mean. For viscosity, record concentration basis, water, temperature, preparation time and instrument conditions. For substitution, retain the supplier’s actual method and reporting basis rather than copying a range from a different use sector.
| Grade field | What it does not replace |
|---|---|
| Degree of substitution | The intended formulation trial |
| Solution viscosity | Substitution information or full grade identity |
| Chemical conformity | The application-specific acceptance record |
Keep substitution screening bounded
If a candidate matches the incumbent’s quoted viscosity but differs in other defined attributes, identify it as a grade change. Evaluate the actual formulation and relevant compatibility or processing conditions rather than assuming numerical equivalence. Conversely, a difference in one raw-material number does not automatically prove an unacceptable finished product.
Send ENVO the existing grade definition, use sector and functional requirement. Request the offered candidate’s current specification and sample. This article concerns a complete grade identity; it does not repeat the separate investigation of undissolved CMC particles during scale-up.
Related decisions
- Food-use or industrial CMC? Match the specification to the intended use
- Preparing a CMC solution: record purchased powder and dry polymer separately
Review Sodium Carboxymethylcellulose (CMC) product identity and purchasing requirements. For the decision above, send ENVO your application, acceptance criteria, quantity and destination. Confirm the offered grade and available documents before ordering.
Technical references support the stated material or test method. Confirm the offered grade and current acceptance criteria for your application. Quality and document guidance
Share your application, target properties and test conditions to discuss the next step.
Send a technical or purchasing enquiry ↗
