Carboxymethyl Starch (CMS)
Carboxymethyl starch (CMS) is an important modified starch with unique properties due to the presence of negatively charged functional group (CH2COO-). The introduction of carboxymethyl groups interrupts the ordered structure of native starch and intervenes with the re-association of gelatinized starch. This modification yields starch with decreased gelatinization temperature, increased solubility and improved storage stability.CMS has a wide range of applications in industries, mostly used for purposes of thickening, stabilization, water preserving, etc. In pharmaceutical industry, CMS, also known as sodium starch glycolate, is commonly used as disintegrant. It is also used in textile industry as thickening agent in textile printing paste and as sizing agent especially for hydrophilic yarn.
Another closed related material is carboxymethyl cellulose (CMC), which has been used intensively in similar industries. However, CMS not only has many advantages over CMC, but comes with a much lower price tag. Therefore, CMS is poising to replace CMC in many of industrial applications.
Some examples of CMS applications are:

