CHEMICALS

HYDROQUINONE (Photographic Grade)
IUPAC name : Benzene-1,4-diol
Other names : Hydroquinone, Idrochinone, Quinol , 1,4-Dihydroxybenzene , 1,4-Hydroxy benzene
CAS no :123-31-9
EEC no :204-617-8
Molecular Formula :C6H6O2
Molecular Weight :110.11g/mol

Hydroquinone is an aromatic organic compound that is a type of phenol, and a derivative of benzene. It is available as a white granular solid.

Hydroquinone is produced industrially by two main routes.The most widely used route is similar to the cumene process in reaction mechanism and involves the dialkylation of benzene with propene to give 1,4-diisopropylbenzene. This compound reacts with air to afford the bis(hydroperoxide), which is structurally similar to cumene hydroperoxide and rearranges to give acetone and hydroquinone in acid. A second route involves hydroxylation of phenol. The conversion uses hydrogen peroxide and affords a mixture of hydroquinone and catechol:

C6H5OH + H2O2 → C6H4(OH)2 + H2O

CATECHOL
IUPAC Name: Benzene-1,2-diol
Synonym: Pyrocatechol 1,2-Benzenediol, 2-Hydroxyphenol, 1,2-Dihydroxybenzene, o-Benzenediol, o-Dihydroxybenzene
CAS no :120-80-9
EEC no :204-427-5
Molecular Formula: C6H6O2
Molecular Weight: 110.11g/mol

Catechol, also known as pyrocatechol or 1,2-dihydroxybenzene, is an organic compound with the molecular formula C6H4(OH)2. It is the ortho isomer of the three isomeric benzenediols. Catechol is available as flakes and 85% solution in solvents.

Catechol is produced industrially by the hydroxylation of phenol using hydrogen peroxide.

C6H5OH + H2O2 → C6H4(OH)2 + H2O

Name: Veratrole
Chemical Name: 1,2-Dimethoxybenzene
Synonym: Pyrocatechol dimethyl ether ortho-Dimethoxybenzene
Cas no.: 91-16-7
Molecular Formula: C8H10O2
Molecular Weight:138.16 g/mol

Veratrole is a clear colourless liquid (above 22°C). Veratrole is manufactured in industry by methylation of pyrocatechol and used as a precursor for the synthesis of active pharmaceutical ingredients, flavouring agents and perfumery products.

Applications
Used as a building block for various chemical compounds, some of it are as follows:

Agrochemical: Used in the synthesis of fungicide Dimethomorph.

Flavours & Fragrances: Used in the synthesis of flavours and fragrances such as Veratraldehyde, 4-Ethyl veratrole and 4-Propenyl veratrole etc.

Active Pharmaceutical Ingredients: Intermediates prepared from Veratrole are used in the synthesis of various active pharmaceutical ingredients such as Verapamil, Mebevarine, Papevarine, Donepezil & Itopride etc.

Name: Guethol
Chemical Name: 2-Ethoxyphenol
Synonym: o-Ethoxyphenol
Cas no.: 94-71-3
Molecular Formula: C8H10O2
Molecular Weight: 138.166 g/mol

Guethol is an aromatic ether in which one of the hydroxy groups has been alkylated to give the corresponding ethyl ether. It is a volatile organic compound and a member of phenols. It derives from a catechol and has a role as a flavouring agent.

4-Methoxyphenol is an organic chemical compound manufactured industrially by the methylation of hydroquinone. It is available in white crystals or flakes in nature with a phenol like odor.

4-MethoxyphenoI is used in industry, mainly as a polymerization inhibitor (in petrochemicals), and as a synthesis intermediate (in agrochemicals). It is also used as a stabilizer for the formulation of inks, adhesives or additives for the textile and leather industries.

MEHQ may cause some adverse effects on human health. It is harmful if swallowed, causes skin irritation and eye irritation. MEHQ is biodegradable and has a low potential for bioaccumulation, so it will not remain persistent in nature.

ODEB (1,2-Diethoxybenzene) is a colorless crystalline solid (below 40°C) with a phenol like odor.

ODEB is manufactured industrially by the ethylation of pyrocatechol and is used as a precursor for the synthesis of active pharmaceutical ingredients and agro-chemical products.

ODEB may have an adverse effect on human health. It is harmful if swallowed, causes slight skin irritation and eye irritation. ODEB has a low potential for bioaccumulation, it will not remain persistent in nature.

Guaiacol
IUPAC Name: 2-Methoxyphenol
Synonym: Pyrocatechol monomethyl ether 1-Hydroxy-2-methoxybenzene
CAS no: 90-05-1
Molecular Formula: C7H8O2
Molecular Weight:124.14 g/mol

Guaiacol is a naturally occurring organic compound known for its flavoring properties. It is clear, colorless to slightly yellow colored liquid (above 28°C) or crystalline solid mass with characteristic aromatic odor.

Guaiacol is manufactured in industry by methylation of pyrocatechol and mainly used as a precursor for synthesis of Vanillin. It is also used in the synthesis of active pharmaceutical ingredients, flavoring agents and perfumery products.

Guaiacol may have adverse effect on human health. It is harmful if swallowed, causes skin irritation and serious eye irritation. Guaiacol if released in the environment, will disperse mainly in the water. As it is biodegradable and has a low potential for bioaccumulation, it will not remain persistent in nature.

Name: Para-Benzoquinone (PBQ)
Chemical Name: 1,4-Benzoquinone
Synonym: p-Dioxobenzene p-Quinonee
Cas no.: 106-51-4
Molecular Formula: C8H4O2
Molecular Weight: 108.1 g/mol

Para-Benzoquinone is an organic chemical compound commonly known as p-Quinone. It is a bright yellow to light brown coloured crystalline solid with a strong pungent, irritating odour. It is manufactured by the oxidation of hydroquinone. It is used as a polymerization inhibitor and as an intermediate in the production of a variety of substances including rubber accelerators and oxidizing agents.

PBQ is able to stain skin dark brown, cause erythema (redness, rashes on skin) and lead to a localized tissue necrosis.

APPLICATION:
Para-Benzoquinone acts as a cross linking agent and is useful in stabilizing unsaturated polyester resins during processing, shipment, and storage in either catalyzed or per catalyzed form.

Used as a chemical intermediate for the manufacture of the agrochemical herbicide, Ethofumesate and the active pharmaceutical ingredient, Calcium dobesilate.