Sodium Carboxymethyl Cellulose (CMC)

Chemical Name: Sodium Carboxymethyl Cellulose (CMC)
Molecular Formula: [C₆H₇O₂(OH)₂OCH₂C00Na]_n
Molecular Weight: ---
CAS No.: 9004-32-4
Standard Executed: GB 1886.232-2016;GB/T 12028-2006

Appearance
White or yellowish fibrous powder or granules.

Application
• Used in food industry to thicken, stabilize, emulsify, suspend, retain water, enhance toughness, puffing, freshness, acid resistance and improve taste;
• As a surfactant in detergents, it can be used as an anti-dirt redeposition agent;
• It is used in drilling fluid, cementing fluid and fracturing fluid in crude oil extraction, mainly as viscosity builder and filter loss reducer;
• In the mineral processing industry, it mainly plays the roles of binder, flotation inhibitor, adjusting agent and dispersant;
• In the paper making process, it can improve the residency and increase the wet strength.

Packing
• Net weight : 25kg;
• PP woven bags or kraft paper bags, with inner PE plastic bags.

Specification

Item	Standard
Item	Food grade	Detergent grade	Petroleum grade	Beneficiation grade	Printing and dyeing grade	Paper grade
Sodium carboxymethyl cellulose ω/%	≥99.5	55.0-95.0	70.0-95.0	≥80.0	≥98.0	≥65.0
Viscosity (1% aqueous solution, 25°C)/m Pa	20-6000	---	---	100-2000	200-3000	---
Viscosity (2% aqueous solution, 25°C)/mPa	---	5-3000	---	---	---	20-800
Apparent viscosity, mPa.s	---	---	≤90	---	---	---
Degree of substitution ω/%	0.7-0.9	0.5-0.9	≥0.8	0.7-0.9	0.8-1.2	0.6-0.95
Loss on filtration ml	---	--	≤10.0	---	---	---
PH (10g/L aqueous solution)	6.0-8.5	8.0-11.5	7.0-9.0	6.5-8.0	6.5-8.5	6.0-8.5
Moisture ω/% ≤	---	10	10	10	10	10
Loss on drying ω/% ≤	8.0	---	---	---	---	---
Sodium glycolate ω/% ≤	0.4	---	---	---	---	---
Chloride (as NaCl) ω/%≤	0.5	---	---	---	---	---
Sodium (Na) ω/% ≤	12.4	---	---	---	---	---
Arsenic (As)(mg/kg)ω/% ≤	2.0	---	---	---	---	---
Lead (Pb)(mg/kg)ω/% ≤	2.0	---	---	---	---	---

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