CAS 120-80-9

The appearance is colorless and crystalline, and it can be sublimated when it is exposed to light or discoloration in the air.

Appearance trait: colorless crystal. Discoloration in case of air and light. Its solution turns tan in the air. Soluble in 2.3 times water, soluble in ethanol, ether, benzene, chloroform, soluble in pyridine and caustic lye.

Soluble in water, ethanol, ether, benzene, lye.

Melting Point: 103 °C

Boiling Point: 245 °C(lit.)

Density 1,371 g/cm3

Vapor density 3.8 (vs air)

Vapor pressure: 1 mm Hg ( 75 °C)

refractive index1.6120 (estimate)

Flash point 279 °F

Storage conditionsStore at RT.

Solubility: The solubility in water is 430 g/L

Acidity coefficient (pKa) 9.85 (at 20°C)

Morphological crystalline tablets

Color: white to light beige

pH 6 (100g/l, H2O, 20°C)

explosive limit1.97%(V)

Water solubility430 g/L (20 ºC)

Sensitivity Air & Light Sensitive

Merck14,7999

BRN471401

Exposure limit TLV-TWA 5 ppm (~22 mg/m3) (ACGIH). .

Stable and stable. Avoid contact with acid chloride, anhydride, alkali, oxidants, nitric acid. sensitivity to light; Discoloration may occur when exposed to air. Flammability.

LogP0.93

CAS DataBase Reference 120-80-9

Carcinogen classification 2B (Vol. 15, Sup 7, 71) 1999

NIST Chemical Substance Information 1,2-Benzenediol(120-80-9)

EPA Chemical Information Catechol (120-80-9)

Purpose 1

Used as an analytical reagent

Purpose 2

It is an important chemical intermediate, which can be used to manufacture rubber hardeners, electroplating additives, skin antiseptic fungicides, hair dyes, photographic developers, etc

Purpose 3

Hydroquinone is an intermediate of the fungicide ethylmycocarb, the insecticide carbocarb and carbofuran.

Purpose four

As an important pharmaceutical intermediate, it is used to manufacture berberine and isoproterenol. It can also be used for the production of 4-tert-butylcatechol, as a polymerization inhibitor for styrene, butadiene and vinyl chloride. Or used in the manufacture of antioxidants, developers, fungicides, rubber additives, electroplating additives, special inks, light stabilizers, dyes, fragrances, etc.

Purpose five

Determination of titanium, molybdenum, tungsten, vanadium, iron, and cerium by chromogenic reaction or colorimetric analysis.

Purpose six

It is used in photography, dyes, antioxidants, light stabilizers, and is an important pharmaceutical intermediate. Used in ICP-AES, AAS, AFS, ICP-MS, ion chromatography, etc. Standard solutions for titration analysis.