Choosing the right high-viscosity and low-viscosity CMC products requires comprehensive consideration of application areas, technical requirements, and product characteristics.
The following are detailed guidance suggestions:

I. Clarify the application scenarios

1. Application scenarios of high-viscosity CMC:

o Oil drilling fluid: High-viscosity CMC is suitable for dense mud. It can effectively increase viscosity, suspend drill cuttings and protect the well wall.
o Construction and ceramics: High-viscosity CMC can be used for putty, mud, etc. Provide better adhesion and stability.
o Food industry: In meat products, ice cream, etc. High-viscosity CMC can provide good water retention and stability.
o Pharmaceutical industry: High-viscosity CMC is often used in liquid medicines or suspensions that require higher viscosity.

2. Application scenarios of low-viscosity CMC:

o Beverages and dairy products: Low-viscosity CMC is suitable for protein drinks, juices, etc. Provide a refreshing taste.
o Paints and daily chemicals: Low-viscosity CMC is used for paint anti-settling, laundry detergent stabilizers, etc.
o Printing and dyes: Low-viscosity CMC is suitable for dye solutions, providing good fluidity and stability.

Ⅱ. Consider technical indicators

1. Viscosity range:

o High viscosity CMC is usually between 1000-3000CPS, suitable for systems requiring higher viscosity.
o Low viscosity CMC is generally between 20-200CPS, suitable for systems with higher fluidity requirements.

2. Degree of substitution:

o CMC with high degree of substitution has better solubility and higher stability. It is suitable for industries with strict performance requirements, such as medicine and food.

3. Purity and particle size:

o High-purity CMC has fewer impurities and more stable performance, suitable for high-demand industries.
o CMC with uniform particle size distribution has better solubility and more uniform solution.

3. Adjust according to usage requirements

1. Solubility and stability:

o High viscosity CMC dissolves slowly but has better stability. Low viscosity CMC dissolves quickly and has good fluidity.
o It should be noted that the viscosity of CMC changes with pH. It performs best under neutral conditions (pH=7). Too high or too low pH will cause a significant decrease in viscosity.

2. Usage concentration:

o High viscosity CMC usually has a thickening effect at 0.05%-0.1%.
o The usage concentration of low viscosity CMC is generally 0.2%-0.5%, and the specific concentration needs to be adjusted according to demand.

IV. Reference industry standards


• In the food industry, it is recommended to use food-grade CMC that meets the GB 1904-2005 standard.
• In the petroleum and construction industries, it is necessary to select CMC with appropriate viscosity according to the mud density and the use environment.