SURGICAL SPIRIT Defination Methyl salicylate 5 ml (0.45 to 0.55% v/v) Diethyl phthalate 20 ml (1.80 to 2.20% v/v) Castor oil 25 ml Industrial Methylated spirt sufficient to produce 1000 ml Identification A.To 1 ml add 0.5 ml of 0.4 M iron(III) chloride hexa hydrate. A violet color is produced. B.To 1 ml add 50 mg of resorcinol and 1 ml of sulphuric acid , heat for 1 min, cool, pour in to water and make alkaline with 5M sodium hydroxide. A distinct green fluorescence is produced which disappears when the solution is made acidic and reappears when it is made alkaline. TESTS Weight per ml 0.817 to 0.827 g. Assay For Methyl salicylate Diute 5 ml to 100 ml with absolute ethanol, further dilute 10 ml of this solution to 100 mnl with absolute ethanol and measure the absorbence of the resulting solution at the maximum at 306 nm, Appendix II B. Caliculate the content of C8H8O3 taking the 335 of the absorbence of a 1% v/v solution of methyl salicylate at the maximum at 306 nm a 1 cm cell.
SURGICAL SPIRITDefinationMethyl salicylate 5 ml (0.45 to 0.55%
v/v)Diethyl phthalate 20 ml (1.80 to 2.20% v/v)Castor oil 25
mlIndustrial Methylated spirt sufficient to produce 1000 ml
IdentificationA. To 1 ml add 0.5 ml of 0.4 M iron(III) chloride
hexa hydrate. A violet color is produced.B. To 1 ml add 50 mg of
resorcinol and 1 ml of sulphuric acid , heat for 1 min, cool, pour
in to water and make alkaline with 5M sodium hydroxide. A distinct
green fluorescence is produced which disappears when the solution
is made acidic and reappears when it is made alkaline. TESTSWeight
per ml 0.817 to 0.827 g.AssayFor Methyl salicylate Diute 5 ml to
100 ml with absolute ethanol, further dilute 10 ml of this solution
to 100 mnl with absolute ethanol and measure the absorbence of the
resulting solution at the maximum at 306 nm, Appendix II B.
Caliculate the content of C8H8O3 taking the 335 of the absorbence
of a 1% v/v solution of methyl salicylate at the maximum at 306 nm
a 1 cm cell.
