2023-09-12 17:35:29
Introduction
Zinc oxide General IUPAC name Synonyms Zinc (Zinc (pronunciation /zɛ̃k/ or /zɛ̃ɡ/) is an element. ..)
Zinc monoxide
Blanc permanent
C.I. 77947
CI pigment white 4 CAS No 1314-13-2 EINECS No 215-222-5 SMILES InChI Appearance powder white to yellow ( There are (at least) five definitions of yellow which designate approximately the same…)
odorless,
hexagonal crystals Chemical properties Raw formula OZnZnO Mass (The term mass is used to designate two quantities attached to a…) molar 81.38 ± 0.02 g·mol-1 Physical properties Melting temperature (In physics and metallurgy, fusion is the passage of a body from the solid state to the state…) 1,975 °C Solubility in water: zero.
Sol in diluted acetic acid,
mineral acids,
ammonia,
ammonium carbonate (The ammonium ion (of formula NH4+) is a polyatomic ion with a positive electric charge (it is…) Density (The density is a physical quantity which characterizes the mass of a material by …) 5.6 g cm-3 Thermochemistry S0 43.65 ± 0.40 J K-1 mol-1 ΔH0 -350.46 ± 0.27 kJ mol-1 ΔH° 4,470 calth mol-1 Precautions Directive 67/548/EEC
N R Phrases: 50/53, S Phrases: 60, 61, WHMIS Non-GHS controlled product
Attention H410, Therapeutic class (Therapeutic (from the Greek therapeuein, to treat) is the part of medicine which…) astringent, ultraviolet filter (An ultraviolet filter is a substance capable of filtering certain radiation to protect…) Units of the SI & CNTP, unless otherwise indicated.
Zinc oxide is a chemical compound with the formula “ZnO”. It is almost insoluble in water, but soluble in acids and alkalis. It forms white hexagonal crystals or a white powder commonly called “white zinc” or “zinc white”. It is also used with eugenol (eugenol (also called 4-allyl-2-methoxyphenol, crude formula…) in the formation of eugenate.
Zinc oxide is found in nature in the form of the mineral (A mineral is a normally inorganic, more rarely organic, substance formed… ) zincite. Crystalline zinc oxide has a piezoelectric effect and is thermochromic, changing from white to yellow when heated.
We use it to make surge protectors.
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