Qingdao Tianya Chemical Co Ltd

Sodium Carboxymethyl Cellulose is prepared from cellulose, the main polysaccharide and constituent of wood and all plant structures. Commercially prepared from wood and chemically modified.

Mainly as thickening agent, but also as filler, dietary fibre, anti clumping agent and emulsfier. Similar as cellulose, but very soluble in water. 
Side effects:

Sodium Carboxymethyl cellulose is very soluble, and can be fermented in the large intestine. Large concentrations can cause intestinal problems, such as bloating, constipation and diarrhoea. It also lowers slightly the blood cholesterol level.

E466 can be consumed by all religious groups, vegans and vegetarians.