Reaxis®  E144 - Sodium Stannate

REAXIS® E144 (Sodium Stannate), also known as Hexahydroxy Stannate or Sodium Stannate Trihydrate, is a Sn (IV)-based inorganic tin chemical. The standard crystalline grade of REAXIS® E144 contains approximately 44% tin. REAXIS® E144 is produced such that residual metal contaminates are controlled, thus resulting in a high-purity end product commonly used as a plating and complexing agent. Alternative sodium stannate grades to the REAXIS® E144 include liquid grade REAXIS® E10 and the higher-purity REAXIS® E144P.  Additional alternatives to REAXIS® E144 would be the potassium grades REAXIS® E140 and REAXIS® E140P. REAXIS® E144 is present on a wide range of international regulatory lists. 

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Technical Information

  • Product Category Inorganic Tin

  • Chemical Name Sodium Stannate

  • CAS Number 12027-70-2

Typical Specifications

Parameter Range
Tin Content (%) 42.5 Min
Free NaOH (%) 2.0 Max
Moisture (%) 2.0 Max
Insolubles (%) 0.1 Max
Cd (ppm) 0 - 5
Sulfate (ppm) 5 - 8
Chlorides (ppm) 5 - 8
Fe (ppm) 2 - 20
Pb (ppm) 2 - 10

International Regulatory Listings

  • TSCA (US) Yes

  • DSL (Canada) Yes

  • REACH (EU) Yes

  • AICS (Australia) Yes

  • KECI (South Korea) Yes

  • ENCS (Japan) Yes

  • TCSI (Taiwan) Yes

  • NZloC (New Zealand) Yes

  • PICCS (The Philippines) Yes

  • NDSL (Canada) No

  • IECSC (China) No


REAXIS® E144 is used in a wide range of applications including surface finishing, stabilization of hydrogen peroxide, and electrolyte additives for battery applications. In surface finishing applications, REAXIS® E144 is used as an alkaline electroplating additive in high-speed plating operations given its ideal solubility. Related applications include the coating of automotive pistons and coin minting.  REAXIS® E144 is used as a stabilizer for hydrogen peroxide via the complexation of destabilizing residual metals thus resulting in extended storage stability. REAXIS® E144 can be a in electrolytes in metal-air batteries to minimize and control electrode corrosion/passivation/fouling. 


REAXIS® E144 has a reactivity characterized by its high tin content, species of tin (as Sn (IV) present, and solubility. Like all inorganic tins products produced by Reaxis, the concentration of the active tin species, versus the inactive forms, is maximized. In terms of functionality, REAXIS® E144 acts as both a good chelating agent for a wide variety of metals and an efficient tin metal plating agent. 

Package & Storage

  • 25kg (55lb) Pails

REAXIS® E144 should be stored in the original packaging.  The container should be closed tightly after each use to maximize shelf life. This product does have the tendency to occasionally clump. This occurrence does not affect the quality/reactivity of the product.

Safety and Handling

Before use of Reaxis products please refer to the relevant Safety Data Sheet (SDS) for safety and toxicological data as well as for the information on proper transportation, storage, and use. SDSs are available by request via our web site, contacting your local representative, or emailing direct to

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This information is provided to the best of our knowledge but without obligation. Reaxis is not liable for any incorrect or missing information. This data sheet becomes invalid upon publication of a new version. Please contact us for the latest version.

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