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Catechol

CAS Number
120-80-9
EC Number
204-427-6
Chemical Formula
C6H6O2
Molecular Weight
110.11 g/mol

Description

Catechol (CAS 120-80-9 ), also known as Pelagol Grey C and oxyphenic acid, is an aromatic diol used across personal care, pharmaceutical, and industrial manufacturing. It functions primarily as an antioxidant and intermediate. In cosmetics and hair care, it acts as an oxidative coupler in permanent hair dye formulations, producing grey and dark tones when combined with primary intermediates. It is essential for achieving specific color profiles. Pharmaceutical manufacturers use it as a key synthetic intermediate in the production of catecholamine-based active ingredients. This includes certain cardiovascular and neurological compounds used in modern medicine. In the textile and leather industries, it contributes to dyeing processes and tanning formulations where controlled oxidative chemistry is required. It ensures consistent results in industrial chemical processing. As a stabilizer and antioxidant, it is incorporated into industrial formulations to inhibit oxidative degradation in rubber and polymer processing. This extends the lifespan and durability of various synthetic materials. The product is supplied as white to off-white crystalline flakes or powder. Technical grade is the standard offering for industrial and dyestuff applications, while higher-purity grades are available for specific needs. These higher-purity grades are designed to meet pharmaceutical intermediate specifications. Packaging typically ranges from small drums to bulk quantities depending on the specific application requirements of the client. Contact us for supply of Catechol Request Quote

Other Names (Synonyms)

Phthalic alcohol | Pelagol Grey C | Oxyphenic acid | O-Phenylenediol | o-hydroxyphenol | O-Hydroquinone | O-Dioxybenzene | o-Dihydroxybenzene

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point105 °C
Boiling Point245.5 °C @ Press: 760 Torr
Density1.344 g/cm³
Flash Point279 °F
AppearanceCatechol is a white crystalline solid. Turns brown on contact with light and air.
Colorwhite to faintly beige
FormCrystalline Flakes
Water Solubility430 g/L (20 ºC)
Vapor Pressure1 mm Hg ( 75 °C)
Refractive Index1.6120 (estimate)
pH6 (100g/l, H2O, 20℃)
Log P0.93

Safety & Handling

Danger
GHS06· ToxicGHS08· Health HazardGHS07· IrritantGHS05· Corrosive

Hazard Statements

H301
H301
H302
H302
H311
H311
H312
H312
H314
H314
H315
H315
H317
H317
H318
H318
H319
H319
H332
H332
H335
H335
H341
H341
H350
H350
H351
H351
H361
H361
H370
H370
H372
H372
H373
H373
H401
H401
H412H412

Precautionary Statements

P203
P203
P260
P260
P261
P261
P262
P262
P264
P264
P270
P270
P271
P271
P272
P272
P273
P273
P280
P280
P316
P316
P317
P317
P318
P318
P319
P319
P321
P321
P330
P330
P363
P363
P405
P405
P501
P501
P265
P265
P316
P316
P317
P317
P352
P352
P340
P340
P316
P316
P317
P317
P317
P317
P317
P317
P364
P364
P364
P364
P233
P233
P331
P331
P354
P354
P338
P338
P338

Trade & Regulatory

HS Code29072900
UN Number2811
ADR Class6.1
Packing GroupIII
Storage Class6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects
WGK (Germany)2