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Pyrocatechol

Pyrocatechol
Pyrocatechol structure
CAS No.
120-80-9
Chemical Name:
Pyrocatechol
Synonyms
Kachin;Katechol;CATECHOL;NSC 1573;120-80-9;c.i.76500;c.i. 76500;fourrine68;NCI-C55856;o-Diphenol
CBNumber:
CB7300091
Molecular Formula:
C6H6O2
Formula Weight:
110.11
MOL File:
120-80-9.mol

Pyrocatechol Properties

Melting point:
100-103 °C (lit.)
Boiling point:
245 °C (lit.)
Density 
1,371 g/cm3
vapor density 
3.8 (vs air)
vapor pressure 
1 mm Hg ( 75 °C)
refractive index 
1.6120 (estimate)
Flash point:
279 °F
storage temp. 
Store below +30°C.
solubility 
430g/l
pka
9.85(at 20℃)
form 
Crystalline Flakes
color 
white to faintly beige
PH
6 (100g/l, H2O, 20℃)
explosive limit
1.97%(V)
Water Solubility 
430 g/L (20 ºC)
Sensitive 
Air & Light Sensitive
Merck 
14,7999
BRN 
471401
Exposure limits
TLV-TWA 5 ppm (~22 mg/m3) (ACGIH). .
Stability:
Stable. Substances to be avoided include acid chlorides, acid anhydrides, bases, oxidizing agents, nitric acid. Light sensitive; may discolour on exposure to air. Combustible.
CAS DataBase Reference
120-80-9(CAS DataBase Reference)
EWG's Food Scores
5-8
FDA UNII
LF3AJ089DQ
NCI Dictionary of Cancer Terms
catechol
Proposition 65 List
Catechol
NIST Chemistry Reference
1,2-Benzenediol(120-80-9)
IARC
2B (Vol. 15, Sup 7, 71) 1999
EPA Substance Registry System
Catechol (120-80-9)
SAFETY
  • Risk and Safety Statements
Symbol(GHS) 
GHS05,GHS06,GHS07,GHS08
Signal word  Danger
Hazard statements  H335-H351-H361-H370-H401-H301-H311-H301+H311-H315-H317-H318-H332-H341
Precautionary statements  P261-P280-P302+P352+P312-P305+P351+P338+P310-P201-P202-P260-P264-P270-P271-P272-P273-P301+P310+P330-P302+P352+P312+P361+P364-P304+P340+P312-P307+P311-P403+P233-P405-P501-P301+P310a-P305+P351+P338-P501a
Hazard Codes  Xn
Risk Statements  21/22-36/38-68-43
Safety Statements  22-26-37-39
RIDADR  UN 2811 6.1/PG 3
WGK Germany  2
RTECS  UX1050000
TSCA  Yes
HS Code  2907 29 00
HazardClass  6.1
PackingGroup  III
Toxicity LD50 in mice (mg/kg): 260 orally; 190 i.p. (Lehman)
NFPA 704
1
0 0

Pyrocatechol price More Price(24)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 135011 1,2-Dihydroxybenzene ReagentPlus , ≥99% 120-80-9 5g $26.9 2021-03-22 Buy
Sigma-Aldrich 8.22261 Pyrocatechol for synthesis 120-80-9 250 g $46.34 2021-03-22 Buy
Sigma-Aldrich 8.22261 Pyrocatechol for synthesis 120-80-9 1 kg $286.75 2021-03-22 Buy
Sigma-Aldrich 135011 1,2-Dihydroxybenzene ReagentPlus , ≥99% 120-80-9 3kg $207 2021-03-22 Buy
Sigma-Aldrich 8.22261 Pyrocatechol for synthesis 120-80-9 25 kg $1510 2021-03-22 Buy

Pyrocatechol Chemical Properties,Uses,Production

Chemical Properties

Off-white powder

Chemical Properties

Catechol is a white crystalline solid. Turns brown on contact with light and air.

Uses

Pyrocatechol is used in photography, in dyeing fur, and as a topical antiseptic.

Uses

In photography; dyeing fur; as reagent.

Uses

In the manufacture of rubber antioxidants and monomer inhibitors to stop radical polymerization; in dyes, as a photographic developer; in formulations for pharmaceuticals, perfumes, inks, and insecticides

Production Methods

Pyrocatechol may be obtained by the fusion of o-phenolsulfonic acid with alkali, by heating chorophenol with a solution of sodium hydroxide at 200°C in an autoclave, or by cleavage of the methyl ether group of guaiacol (obtained from beechwood tar) with hydriodic acid.

Definition

A colourless crystalline PHENOL containing two hydroxyl groups. It is used in photographic developing.

Synthesis Reference(s)

The Journal of Organic Chemistry, 45, p. 4275, 1980 DOI: 10.1021/jo01310a003

General Description

Solid; white; odorless. Sinks and mixes with water.

Air & Water Reactions

Turns brown on exposure to air and light, especially when moist. Water soluble. Aqueous solutions soon turn brown on exposure to air and light.

Reactivity Profile

POISONOUS GASES MAY BE PRODUCED WHEN HEATED. Pyrocatechol may form toxic fumes at high temperatures. [USCG, 1999]. Pyrocatechol can react with acid chlorides, acid anhydrides, bases and oxidizing agents. Pyrocatechol reacts violently on contact with concentrated nitric acid. Pyrocatechol acts as a reducing agent .

Hazard

Strong irritant. Toxic by skin absorption. Eye and upper respiratory tract irritant, and der- matitis. Possible carcinogen.

Health Hazard

DUST: Irritating to eyes, nose and throat. If inhaled will cause coughing or difficult breathing. SOLID: Will burn skin and eyes. Harmful if swallowed.

Health Hazard

Acute oral and percutaneous toxicity of pyrocatechol is greater than that of phenol; inhalation toxicity is less than that of phenol. The toxic symptoms include weakness, muscular pain, dark urine, tremor, dyspnea, and convulsions. Large amounts can produce degenerative changes in renal tubules. Large doses can cause death due to respiratory failure. Skin contact can cause eczematous dermatitis.
LD50 value, oral (rats): 260 mg/kg
LD50 value, skin (rabbits): 800 mg/kg.

Fire Hazard

Combustible. POISONOUS GASES MAY BE PRODUCED WHEN HEATED. May form toxic fumes at high temperatures.

Safety Profile

Poison by ingestion, subcutaneous, intraperitoneal, intravenous, and parenteral routes. Moderately toxic by skin contact. Experimental reproductive effects. Can cause dermatitis on skin contact. An allergen. Human mutation data reported. Questionable carcinogen. Systemic effects sirmlar to those of phenol. Combustible when exposed to heat or flame; can react vigorously with oxidizing materials. Hypergolic reaction with concentrated nitric acid. To fight fire, use water, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes. See also PHENOL.

Potential Exposure

Used as a chemical intermediate; pharmaceutical and veterinary drug; as an antiseptic; in photography; in dyestuff manufacture and application. It is also used in electroplating, in the formulation of specialty inks; in antioxidants; and light stabilizers.

Carcinogenicity

Pyrocatechol has been extensively studied for its role in carcinogenesis of the rat glandular stomach; it was concluded that pyrocatechol is carcinogenic. When rats and mice were administered 0.8% pyrocatechol in their feed for life, there was an increase in glandular stomach adenocarcinoma in both male and female rats. Pyrocatechol also caused hyperplasia of the glandular stomach in both rats and mice, a mechanism that could cause promotion of carcinogen-initiated cells; no effects on the esophagus or urinary bladder were reported. There were no cutaneous neoplasms when pyrocatechol was applied in dermal studies. Pyrocatechol may be classified as a cocarcinogen because it enhanced the number and/or incidence of lesions in the stomach induced by several carcinogenic nitrosamines and cutaneous neoplasms when administered dermally together with several carcinogens.

Shipping

UN 2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.

Purification Methods

Crystallise catechol from *benzene or toluene and sublime it in vacuo. [Rozo et al. Anal Chem 58 2988 1986, Beilstein 6 IV 5557.]

Incompatibilities

Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides.

Pyrocatechol Preparation Products And Raw materials

Raw materials

Preparation Products


Pyrocatechol Suppliers

Global( 393)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-66670886
info@dakenchem.com China 20907 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 22607 55
ATK CHEMICAL COMPANY LIMITED
+86 21 5161 9050/ 5187 7795
+86 21 5161 9052/ 5187 7796 ivan@atkchemical.com CHINA 26762 60
Hefei TNJ Chemical Industry Co.,Ltd.
+86-0551-65418679
86-0551-65418697 info@tnjchem.com China 3000 55
career henan chemical co
+86-371-86658258
sales@coreychem.com CHINA 29954 58
Hubei Jusheng Technology Co.,Ltd.
86-18871470254
027-59599243 linda@hubeijusheng.com CHINA 28229 58
Hebei Guanlang Biotechnology Co., Ltd.
+8619930503282
sales3@crovellbio.com China 5930 58
Chongqing Chemdad Co.,Ltd
+86-19923101450
sales@chemdad.com CHINA 4000 58
Xiamen AmoyChem Co., Ltd
+86 592-605 1114
sales@amoychem.com CHINA 6369 58
Hubei xin bonus chemical co. LTD
86-13657291602
027-59338440 linda@hubeijusheng.com CHINA 23035 58

View Lastest Price from Pyrocatechol manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2021-12-03 Pyrocatechol
120-80-9
US $0.00 / Kg/Drum 1KG 99.9% 100000kg per month Wuhan Mulei New Material Technology Co. Ltd
2021-03-17 Pyrocatechol
120-80-9
US $10.00 / KG 1KG 99.99 10Ton Hebei Miaobian Biotechnology Co., Ltd
2020-05-26 Pyrocatechol
120-80-9
US $0.00 / mg 20mg GC≥98% 100 g Shanghai Standard Technology Co., Ltd.

Pyrocatechol Spectrum


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