Calcium sulfite

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High-reactivity calcium sulfite Calcium sulfite with improved reactivity thanks to special particle shape


Tateho Chemical Industries Co., Ltd. manufactures “Q-ALU,” a kind of calcium sulfite, by applying its unique reaction technology to carefully selected raw material.
Tateho’s calcium sulfite, “Q-ALU,” is characterized by a special particle shape that secures compatibility between high reactivity and ease of handling, with optimum conditions for removing residual free chlorine in tap water.
“Q-ALU” is used as a water purification dechlorinator or a delayed reducing agent.
It is supplied in various granulation type products as well.

Features and usages

Features Usages
  • With its complexly shaped particles, “Q-ALU” has large specific surface areas, thus a high per-weight chlorine-treating capability.
  • Because specific surface areas are large despite large particle sizes, the reduction in specific surface areas after granulation can be suppressed.
  • Dechlorinator used in water purification units
  • Delayed reducing agent


Grade Q-ALU Z-50
Chemical properties Assay (%) 94.1
Mg (%) 0.12
Cl (%) 0.09
Fe (%) 0.0003
As (%) 0.0001
Pb (%) 0.0001
Physical properties Specific surface area (103m2-kg-1) 4.1
Median 50% particle size (10-6m) 21.6
  • Mg, Cl, Fe : X-ray fluorescence method.
  • As, Pb : ICP(Inductively coupled plasma) Optical Emission Spectroscopy.
  • Specific Surface Area : Gas adsorption method.
  • Particle Size : Laser diffraction scattering method.

※The properties are the typical values and not guaranteed values.

Q-ALU Granulation type Products

Granulation type products are also available; contact us for further information.




Tateho Chemical Industries Co.,Ltd.

  • Paid-up Capital : JPY 450 Million
  • Number of Employees : Approx.270
  • Establishment : 1966

Received ISO9000, 14000

"Tateho's vision of creating new environment-friendly materials"

Tateho Chemical Industries Co., Ltd. was born in the town of Ako--an area blessed with a warm climate and the abundant marine resources of the Inland Sea of Japan.
The history of the salt industry in Ako is long--dating back nearly 1300 years to the Nara period.
In 1966, Tateho was established as a group of engineers seeking to provide new materials widely useful for society by putting this inherited, time-honored wisdom into full use, and by effectively utilizing bittern, a substance left after separating salt from seawater.
Since then, we have continued to provide the world with highly functional products--including magnesium oxide, magnesium hydroxide, electrofused magnesium oxide, single crystal magnesium oxide, flame retardants, and ceramics--by expanding our businesses on the basis of our proprietary crystallization control technology.
We are committed to contributing to industry worldwide under the slogan of "Aiming to be a development-oriented company friendly to the natural environment and leading the world with proprietary technologies" by continuously adhering to our environmental policy and further improving our proprietary technologies.