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CMEC® (Carboxymethylethylcellulose) has cellulose as a raw material and is mixed ether than can obtain partial carboxymethylation or ethylation.CMEC® (Carboxymethylethylcellulose) is made of cellulose and is mixed ether by partial carboxymethylation or ethylation. Listed in JPE (Japan Pharmaceutical Excipients) and this is mainly used as a base for enteric film coating and controlled-release formulation. In addition, it is used as a carrier for solid dispersion with the aim of improving the solubility of poorly soluble drugs.

Chemical Name: Carboxymethylethylcellulose

CAS Number: 9000-11-7

Functions: Carrier, Coating System

Dosage Form: Tablets

Certifications & Compliance: Japan Pharmacopeia (JP)

Synonyms: Carboxymethyl cellulose ether

Technical Data Sheet
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Identification & Functionality

Pharma & Nutraceuticals Functions
CAS No.
9000-11-7
EC No.
618-326-2

Features & Benefits

Product Highlights
  • Chemically stable

The chemical structure of CMEC is built up by ethel linkage, difficult to be hydrolyzed with CMEC itself being chemically stable.

  • Disintegration of pH dependency

The disintegration behavior of tablets coated with CMEC depends on the pH regardless of the buffer solution. It is slower to disintegrate in a lower pH but faster in a higher pH. By taking advantage of this property, using enteric material is possible. Also, the combination with controlled release materials of pH independency enables the formulation of various dissolution profiles.

CMEC® - Product Highlights

  • As a Matrix-Forming Material

CMEC is used for a matrix-forming material with API. The release speed rate is controllable by adjusting the ratio of API and CMEC.

  • Improve dissolution of poorly soluble drugs

CMEC is a carrier of solid dispersion for improving solubility of poorly soluble API.

  • Protective coating for sugar-coated tablet

The CMEC film thickness of 100μm has suitable moisture prevention. It is effective to use CMEC as protective coating agent on sugar-coated tablets including water-sensitive API.

Applications & Uses

Dosage Form
Manufacturing Technology
Usage Guidelines

Add CMEC to water : ethanol = 1 : 0.5 solution to disperse. Then add remaining ethanol and agitate to dissolve until smooth.

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Weighted mean molecular (Mw)4.9×10-4
Number average molecular weight (Mn)1.4×10-4
Variance ratio (Mw/Mn)3.5

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

Solubility Profile

CMEC is insoluble in water, but soluble in water and ethanol (ethanol 70-90%) combined.