Pyrogallol
Other names	1,2,3-Trihydroxybenzene Pyrogallic acid
Identifiers
CAS number	[87-66-1]
SMILES	OC1=C(O)C=CC=C1O
Properties
Molecular formula	C6H6O3
Molar mass	126. CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to A chemical formula is a way of expressing information about the Atoms that constitute a particular Chemical compound, and how the relationship between those atoms changes Molar mass, symbol M, is the Mass of one mole of a substance ( Chemical element or Chemical compound) 11 g/mol
Density	1. The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different 45 g/cm3
Melting point	131-134 °C
Boiling point	309 °C
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Pyrogallol or benzene-1,2,3-triol is a white crystalline powder and a powerful reducing agent. The melting point of a solid is the temperature range at which it changes state from solid to Liquid. The boiling point of a liquid is the temperature at which the Vapor pressure of the liquid equals the environmental pressure surrounding the liquid In Chemistry, the standard state of a material is its state at 1 bar (100 Kilopascals exactly It was first prepared by Scheele 1786 by heating gallic acid. Carl Wilhelm Scheele (9 December 1742 &ndash 21 May 1786 was a German - Swedish pharmaceutical chemist born in Stralsund, Western Pomerania, Gallic acid is an Organic acid, also known as 345-trihydroxy Benzoic acid, found in Gallnuts Sumac, Witch hazel, Tea leaves An alternate preparation is heating para-chlorophenoldisulphonic acid with potassium hydroxide. Potassium hydroxide is the Inorganic compound with the formula K[[hydroxide OH]]

When in alkaline solution, it absorbs water readily, turning purple from a colourless solution. It can also absorb oxygen and is used to calculate the amount of oxygen in air. Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the

One can find its uses in hair dying, dying of suturing materials and for oxygen absorption in gas analysis. Hair coloring is a process used to color human Hair. It is used for a variety of purposes most commonly to return gray hair to its previous color to change hair color Oxygen (from the Greek roots ὀξύς (oxys (acid literally "sharp" from the taste of acids and -γενής (-genēs (producer literally begetteris the It also has antiseptic properties. Antiseptics (from Greek αντί - anti, '"against" + σηπτικός - septikos, "putrefactive" are antimicrobial Pyrogallol was also used as a developing agent in black-and-white developers, but its use is largely historical except for special purpose applications. In Film developing, photographic developer (or just developer) is a chemical that makes the Latent image on the film or print visible (Hydroquinone is more commonly used today. Hydroquinone, also benzene-14-diol or quinol, is an Aromatic Organic compound which is a type of phenol, having the Chemical )

Limited exposure to this compound is recommended. Pyrogallol is not likely to be used as a modern hair dye due to the suspected toxicity of the compound.

See also

• Gallic acid
• Catechol

References

Gallic acid is an Organic acid, also known as 345-trihydroxy Benzoic acid, found in Gallnuts Sumac, Witch hazel, Tea leaves Pyrocatechol, more commonly known as catechol, is the Organic compound with the formula C6H4(OH2

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