Sumitomo Osaka Cement Co., Ltd.

Masahiro Nobe

Syunsuke Suma

Tadashi Neya

A zinc oxide powder in which a BET specific surface area (X) of the powder is 1.5 m/g or more and 65 m/g or less, a value obtained by a formula: an apparent specific volume (mL/g) measured by a loose packing method of the zinc oxide powder/an apparent specific volume (mL/g) measured by a tapping method of the zinc oxide powder is 1.5 or more and 2.5 or less, and Formula (1) and Formula (2) shown below are satisfied.1/2=+0.06&#x2003;&#x2003;(1)(2&#x2212;1)/2&#x2265;0.02&#x2003;&#x2003;(2)

Zinc oxide powder, dispersion, paint, and cosmetic

A zinc oxide powder in which a BET specific surface area of the powder is 8 m/g or more and 65 m/g or less, an apparent specific volume measured by a loose packing method of the powder is 1.0 mL/g or more and 7.5 mL/g or less, and a value indicated by (the apparent specific volume measured by the loose packing method/an apparent specific volume measured by a tapping method), which is obtained by dividing the apparent specific volume (mL/g) measured by the loose packing method by the apparent specific volume (mL/g) measured by the tapping method of the powder, is 1.50 or more and 2.50 or less.

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Tokyo, Japan

Masahiro Nobe