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Caustic Soda

pH Control Agent

Product Description

Caustic Soda (NaOH) is sodium hydroxide, which has a molar mass of 40.0 g/mol. It is a strong alkali and must be handled with extreme care. Its rapid dissolution in water results in liberation of large amounts of heat.


Primarily used to control alkalinity and pH in aqueous fluids (limits the solubility of calcium and magnesium) by precipitating the metal hydroxides, Ca (OH)2 and Mg(OH)2

Aids the solubilization of products such as lignosulfonates and lignites and activates Bentonite dispersion.


Economical source of hydroxyl ions to control pH

Concentrated chemical and very effective at small treatment levels

Increases pH which reduces corrosion of steel exposed to drilling fluids

Can be used in most drilling fluids

Technical Data


White flake


99.0% Min

Na2CO3 content

1.0% Max

Recommended Treatment

Add Caustic Soda in the range of 0.25-0.5 lbs/bbl (0.71-1.43 kg/m³) to water based systems.

For safety reasons, caustic soda must never be mixed through the mud hopper; it must be added via a chemical barrel or to a low-volume premix in a slug pit by direct addition through the grating. The premix is then transferred slowly to the active system over the course of one or several circulations.

Environmental Information

For information concerning environmental regulations applicable to Caustic Soda, contact the Health Safety and Environmental Department.


Transportation of commodity name is not restricted by either international or CHINA regulatory agencies.

Safe Handling Recommendations

Utilize normal precautions for employee protection when handling chemical products. Use of standard PPE is recommended for employee comfort and safety. See Material Safety Data Sheet (MSDS) prior to use.

Package and Storage

25kg bags or according to customer’s requirement.Store in a closed and sealed containers, in a cool dry area, protected from precipitation and contact with moisture.

Caustic Soda is corrosive. Spills should be cleaned up immediately.

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