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Resorcinol USP BP Analytical Reagent Grade Supplier, Manufacturer's Representative, CAS Number 108-46-3

FInOrIC, etymologically derived from our business line of Fine Inorganic, Organic and Industrial Chemicals, offers chemicals for Oil & Gas Exploration, Hydraulic Fracturing, Production, Stimulation, Coiled Tubing, Food & Feed Ingredients, Mineral Fortifiers and Pharmaceutical Excipients, in 55 countries across 5 continents. Backed by company owned & operated full-fledged chemical manufacturing facilities in Pleasanton, Midland & Houston, Texas with associated manufacturing sites in India, UAE and China we are a truly multi-national chemical manufacturer and distributor.

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Resorcinol
USP BP Analytical Reagent Grade CAS 108-46-3 Suppliers
Resorcinol

Resorcinol USP Grade
C6H6O2 110.11
1,3-Benzenediol
Resorcinol CAS 108-46-3.

Resorcinol contains not less than 99.0 percent and not more than 100.5 percent of C6H6O2, calculated on the dried basis.

Identification:
A: Infrared Absorption 197K NOTE—If necessary to recrystallize, dissolve in dehydrated alcohol.]
B: Dissolve 100 mg in 2 mL of 1 N sodium hydroxide, add 1 drop of chloroform, and heat the mixture: an intense crimson color is produced. Then add a slight excess of hydrochloric acid: the color changes to pale yellow.
C: To 10 mL of a solution (1 in 100) add 1 drop of ferric chloride: a blue-violet color is produced, and it fades slowly.
Melting range: between 109 and 111 .
Loss on drying: Dry it over silica gel for 4 hours: it loses not more than 1.0% of its weight.
Residue on ignition: not more than 0.05%.
Phenol: Heat gently a solution (1 in 20): the odor of phenol is not perceptible.
Catechol: To 10 mL of a solution (1 in 20) previously mixed with 2 drops of 1 N acetic acid add 0.5 mL of lead acetate: no turbidity is produced.
Ordinary impurities: To pass the test.
Assay: Dissolve about 1.5 g of Resorcinol, accurately weighed, in water to make 500.0 mL. Transfer to an iodine flask 25.0 mL of the resulting solution, add 50.0 mL of 0.1 N bromine VS, dilute with 50 mL of water, add 5 mL of hydrochloric acid, and at once insert the stopper in the flask. Shake for 1 minute, allow to stand for 2 minutes, and add 10 mL of potassium iodide TS while slightly loosening the stopper. Shake thoroughly, allow to stand for 5 minutes, remove the stopper, and rinse it and the neck of the flask with 20 mL of water into the flask. Titrate the liberated iodine with 0.1 N sodium thiosulfate, adding starch as the endpoint is approached. Perform a blank determination. From the volume of 0.1 N sodium thiosulfate used, calculate the volume, in mL, of 0.1 N bromine consumed by the resorcinol. Each mL of 0.1 N bromine is equivalent to 1.835 mg of C6H6O2.


1,3-Benzenediol or Resorcinol Analytical Reagent
1,3-C6H4(OH)2
Formula Wt 110.11
CAS Number 108-46-3

REQUIREMENTS
Assay: 99.0-100.5% C6H4(OH)2
Melting point: 110-112C.


Resorcinol BP Ph Eur Grade
Ph Eur
C6H6O2 --- 110.1 --- 108-46-3
Action and use: Keratolytic.

DEFINITION
Resorcinol contains not less than 98.5 per cent and not more than the equivalent of 101.0 per cent of benzene-1,3-diol, calculated with reference to the dried substance.

CHARACTERS
A colourless or slightly pinkish-grey, crystalline powder or crystals, turning red on exposure to light and air, very soluble in water and in alcohol.

IDENTIFICATION
A. Melting point:109C to 112C.
B. Dissolve 0.1 g in 1 ml of water add 1 ml of strong sodium hydroxide solution and 0.1 ml of chloroform, heat and allow to cool. An intense, deep-red colour develops which becomes pale yellow on the addition of a slight excess of hydrochloric acid.
C. Thoroughly mix about 10 mg with about 10 mg of potassium hydrogen phthalate, both finely powdered. Heat over a naked flame until an orange-yellow colour is obtained. Cool and add 1 ml of dilute sodium hydroxide solution and 10 ml of water and shake to dissolve. The solution shows an intense green fluorescence.

TESTS
Solution S: Dissolve 2.5 g in carbon dioxide-free water R and dilute to 25 ml with the same solvent.
Appearance of solution: Solution S is clear and not more intensely coloured than reference solution and remains so when heated in a water-bath for 5 min.
Acidity or alkalinity: To 10 ml of solution S add 0.05 ml of bromophenol blue solution. Not more than 0.05 ml of 0.1 M hydrochloric acid or 0.1 M sodium hydroxide is required to change the colour of the indicator.
Related substances: To pass the test
Pyrocatechol: To 2 ml of solution S add 1 ml of ammonium molybdate solution and mix. Any yellow colour in the solution is not more intense than that in a standard prepared at the same time in the same manner using 2 ml of a 0.1 g/l solution of pyrocatechol.
Loss on drying: Not more than 1.0 per cent, determined on 1.00 g of powdered substance by drying in a desiccator for 4 h.
Sulphated ash: Not more than 0.1 per cent, determined on 1.0 g.

Suppliers, Manufacturer's Representative:

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Beasley Houston Pleasanton Midland, Texas, USA.
Also Oklahoma, OK and Williston, ND USA

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Email:
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3 January, 2021