Resorcinol CAS 108-46-3 Purity >99.0% (HPLC)

Resorcinol
C6H6O2 110.11
1,3-Benzenediol
Resorcinol [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.
Packaging and storage- Preserve in well-closed, light-resistant containers.
USP Reference standards <11>-
USP Resorcinol RS Click to View Structure
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 TS: a blue-violet color is produced, and it fades slowly.
Melting range <741>: between 109 and 111.
Loss on drying <731>- Dry it over silica gel for 4 hours: it loses not more than 1.0% of its weight.
Residue on ignition <281>: 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 TS: no turbidity is produced.
Ordinary impurities <466>-
Test solution: methanol.
Standard solution: methanol.
Eluant: a mixture of hexanes and ethyl acetate (70:30).
Visualization: 17 and then 1.
Application volume: 10 µL.
Limits: not more than 1.0%.
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 VS, adding starch TS as the endpoint is approached. Perform a blank determination. From the volume of 0.1 N sodium thiosulfate VS used, calculate the volume, in mL, of 0.1 N bromine VS consumed by the resorcinol. Each mL of 0.1 N bromine is equivalent to 1.835 mg of C6H6O2. 

Risk Codes
R22 - Harmful if swallowed
R36/38 - Irritating to eyes and skin.
R50 - Very Toxic to aquatic organisms
R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
R41 - Risk of serious damage to eyes
R38 - Irritating to the skin
Safety Description
S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S61 - Avoid release to the environment. Refer to special instructions / safety data sheets.
S39 - Wear eye / face protection.
UN IDs UN 2876 6.1/PG 3
WGK Germany 2
RTECS VG9625000
FLUKA BRAND F CODES 3-8-9-23
TSCA Yes
HS Code 2907210001
Hazard Class 6.1
Packing Group III