2023-09-12 17:35:29
Introduction
Zinc oxide General IUPAC name Synonyms Zinc (Zinc (pronunciation /zษฬk/ or /zษฬษก/) 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 sameโฆ)
odorless,
hexagonal crystals Chemical properties Raw formula OZnZnO Mass (The term mass is used to designate two quantities attached to aโฆ) molar 81.38 ยฑ 0.02 gยทmol-1 Physical properties Melting temperature (In physics and metallurgy, fusion is the passage of a body from the solid state to the stateโฆ) 1,975 ยฐC 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 isโฆ) Density (The density is a physical quantity which characterizes the mass of a material by โฆ) 5.6 g cm-3 Thermochemistry S0 43.65 ยฑ 0.40 J K-1 mol-1 ฮH0 -350.46 ยฑ 0.27 kJ mol-1 ฮHยฐ 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 whichโฆ) astringent, ultraviolet filter (An ultraviolet filter is a substance capable of filtering certain radiation to protectโฆ) Units of the SI & CNTP, unless otherwise indicated.
Zinc oxide is a chemical compound with the formula โZnOโ. It is almost insoluble in water, but soluble in acids and alkalis. It forms white hexagonal crystals or a white powder commonly called โwhite zincโ or โzinc whiteโ. It is also used with eugenol (eugenol (also called 4-allyl-2-methoxyphenol, crude formulaโฆ) 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 formedโฆ ) 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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