Sodium carboxymethyl cellulose (CMC), a high molecular weight compound, is easily soluble in water and stable to heat and acids and bases. It is synthesized from cellulose and other raw materials and is widely used in the food, pharmaceutical, and personal care industries. Use should be in accordance with the regulations, and storage should be dry and shaded.

Sodium Carboxymethyl Cellulose (CMC), also known as Carboxymethyl Cellulose Sodium, is a high molecular weight polymer. The following is a detailed introduction to it:
1. Basic Information
Chinese name: Sodium Hydroxymethyl Cellulose

English Name: Carboxymethyl Cellulose Sodium (Abbreviation: CMC)

Appearance: Usually white or off-white fibrous powder or granules.

Section Two: Physical and Chemical Properties
Solubility: Easily dissolved in water, forming transparent or slightly cloudy colloidal solution.

Stability: Thermally stable, not easily fermented, acid-base stable, but will partially dissolve or precipitate in strong acidic or basic solutions.

Viscosity: The viscosity of its aqueous solution varies with concentration and pH value.

Three, Synthesis Method
The synthesis of sodium hydroxymethyl cellulose mainly uses raw materials such as cellulose, sodium hydroxide, and epichlorohydrin. The specific synthesis steps are as follows:

The pretreatment of cellulose: Mix cellulose powder with a sodium hydroxide solution, heat to a certain temperature, and stir well to obtain an alkaline cellulose solution.

Etherification reaction: Mix the alkaline cellulose solution with epichlorohydrin, heat to a certain temperature, and stir well to conduct the etherification reaction.

Neutralization and Hydrolysis: After etherification, cool the solution, add acid for neutralization, and then heat to a certain temperature to conduct a hydrolysis reaction.

Separation and Purification: After hydrolysis, the solution is filtered to obtain a precipitate of sodium hydroxymethyl cellulose. The precipitate is dissolved, filtered, concentrated, and dried to obtain sodium hydroxymethyl cellulose product.

Section 4: Application Fields
Sodium hydroxymethyl cellulose (Na-HMC) is highly regarded due to its unique physical and chemical properties and its wide range of applications. Here are its main application areas:

The food industry: As thickening agents, emulsifiers, stabilizers, etc., they are used to improve the texture and taste of food. The amount used in soy milk, ice cream, ice cream, jelly, beverages, and canned foods is about 1% to 1.5%.

Pharmaceutical Industry: Used as drug carriers, emulsifying stabilizers for injections, adhesive agents for tablets, and film-forming agents, etc.

Daily Chemical Industry: Used as a binder, anti-re-settling agent, etc.

Dyeing and Printing Industry: Used as protective colloids for sizing agents and printing pastes.

Petrochemical: Can be used as a component of oil extraction fracturing fluid, mud stabilizer, water retention agent, etc.

Textile Industry: Used as sizing agents, thickening agents for dyeing and printing pastes, and for textile printing and stiffening treatments.

Coating Industry: Used as anti-settling agents, emulsifiers, dispersants, leveling agents, adhesives, etc.

5. Safety Precautions
When using sodium hydroxymethyl cellulose, it should be carried out strictly in accordance with relevant regulations and operating procedures to ensure safe use.

Avoid prolonged contact or ingestion.

When storing, it should be placed in a dry, shady, well-ventilated place, away from direct sunlight and high temperatures.