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Aluminum hydroxide is a high-purity, white crystalline powder derived from the Bayer process and widely used across industrial and chemical manufacturing sectors. With an Al₂O₃ content exceeding 65% and exceptional whiteness (Ry >83), it offers outstanding optical and chemical consistency. Its low levels of impurities — including SiO₂, Fe₂O₃, Na₂O, and CaO — make it one of the most reliable alumina precursors available for demanding industrial applications, available in both wet and dry forms to suit different processing requirements.
Aluminum hydroxide serves as a critical raw material and functional additive across a broad range of industries. In the flame retardant sector, it is one of the most widely used halogen-free fire suppressants — releasing water vapour when exposed to heat, effectively cooling surfaces and suppressing flames without toxic emissions. It is extensively used in the production of calcined alumina, aluminium sulphate, zeolites, and specialty ceramics. In the plastics, rubber, and cable industries, it acts as both a filler and a smoke suppressant. The pharmaceutical industry relies on it as an active ingredient in antacids, while paper manufacturers use it to improve brightness and coating quality. Its combination of high purity, controlled particle size distribution, and consistent whiteness makes it a versatile and cost-effective choice for manufacturers requiring reliable performance across production cycles.
| Wet | Dry | |
|---|---|---|
| Loss on Ignition (1000°C) | ~34.6 | ~34.6 |
| Al₂O₃ | >65.0 | >65.0 |
| SiO₂ | <0.015 | <0.015 |
| Fe₂O₃ | <0.015 | <0.015 |
| Na₂O | <0.15 | <0.15 |
| CaO | <0.030 | <0.030 |
| Wet | Dry | |
|---|---|---|
| Moisture [105°C, 2h] | 4 – 6 | 0.1 – 0.3 |
| Whiteness, Ry 457 nm | >83 | >83 |
| Wet | Dry | |
|---|---|---|
| d 50 [µm] | 90 – 110 | 85 – 110 |
| < 45 µm [%] | <10 | <12 |
| Available formats | 1.0 MT, 1.1 MT, 1.2 MT (PE-PP Bigbags) · Bulk |
| Registration | HS Code |
|---|---|
| CAS No: 21645-51-2 · Reach No: 01-2119529246-39 | 2818 30 00 00 0 |