IRO Oil Drilling Chemical Co., Ltd.
Tel:+86 532 66888206
Add:Mushi Town, Tengzhou City, Zaozhuang, Shandong, China


Carboxymethyl Cellulose Sodium (CMC)-Oil Drilling Grade

CAS NO.: 9000-11-7

Molecular Formula: [C6H7O2(OH)2CH2COONa]n

Structural Formula:



Carboxymethyl Cellulose Sodium (CMC) is a cellulose derivative obtained by chemically modificating the natural cellulose. CMC is one of the most important water soluble polymers with many advantages that other natural or synthetic glues do not have. CMC is white and flowing fine powder. CMC is tasteless, smelless, mould-proof, non-toxic, non-flammable and easily dissolved in water to become transparent viscose solution. CMC solution has good properties of thickening, adhering, emulsifying, and stabilizing. membrane forming, moisture-holding, shape-holding, dispersing and anti-enzyme. The solution of CMC can be mixed with dissolvable animal glues, glycerin, sobbitol, Arabic gum, pectin, xanthic gum and dissolvable starch.


Physical Specification of CMC for Oil drilling liquids & Oil drilling liquids properties (According to SY5093-92)

Appearance White or light yellow powder, freely flowable
Water,% 10 max
CMC,% 80.0 min 85.0 min 95.0 min
Substitution degree,% 0.80 min 0.65 min 0.8 min
PH 7.0-9.0 7.0-9.0 6.5-8.0
Type Item Typical measured values
Distilled water Brine Saturated brine
Base mud Filtration loss, ml 60±10 90±10 100±10
Apparent viscosity, mPa•s 6 max 6 max 10 max
PH 8.0±1.0 8.0±1.0 7.5±1.0
HV-CMC Mud generating capacity, m3 /t 200 min 150 min 160 min
LV-CMC Filtration loss = 10ml Addition rate, g/l -- 7.0 max 10.0 max
Apparent viscositymPa•s -- 4.0 max 6.0 max
MV-CMC Addition rate,g/l 6.0 14.0 3.5
Apparent viscosity,mPa•s 15 min 15 min 15 min
Filtration loss,ml 9 max 9 max 9 max

Technical Specification of CMC for oil drilling liquids (According to GB/T5005-2001 or API)

Type Specification
CMC-HVT Viscometer 600r/min Distilled water 30.0 min
40g/dm3 brine 30.0 min
Saturated brine 30.0 min
Filtration Loss (ml) 10.0 max
CMC-LVT Viscometer 600r/min 90.0 max
Filtration Loss (ml) 10.0 max

Note:We could arrange product according to customer's specification


CMC Oil Drilling Grade used in fracturing fluid ,drilling fluid and well cementing fluid as fluid loss controller and tackifier. CMC can protect the shaft wall and prevent mud loss thus enhance recovery efficiency. CMC has the following characteristics:
• Excellent water retention even at low concentration.
• Excellent thickening effect.
• Good resistance to salt and temperature change.
• Imparts excellent rheological property.


Packed in multiply paper bags or fiber drums (25KG), or as per customer requirement; keep dry


Sodium CarboxyMethyl Cellulose, CMC, CMC-Na, CM-Cellulose, Carboxymethyl Cellulosec Carboxymethyl cellulose Ether