[d-Camphor reference standard (Control 911) and dl-Camphor Reference Standard (Control 911) of the National Institute of Hygienic Sciences].
The raw materials of d-camphor and dl-camphor were examined for preparation of the "d-Camphor Reference Standard" and "dl-Camphor Reference Standard". Analytical data obtained were as follows: ultraviolet spectrum, lambda max = 290nm; infrared spectrum, 2958, 1742, 1045cm-1; optical rotation, [alpha]D20 = +42.7 degrees (d-camphor), [alpha]D20 = -0.3 degrees (dl-camphor); melting point, 180 degrees C (d-camphor), 179 degrees C (dl-camphor); gas-chromatography (GC), one impurity was detected in d-camphor and three impurities in dl-camphor; assay, 99.5% (d-camphor), 99.5% (dl-camphor) by GC. Based on the above results, these raw materials were authorized as the Japanese Pharmacopoeia Standard (Control 911).
Izumi
W
W
Murai
M
M
Komatsu
H
H
Ishimitsu
S
S
Okada
S
S
D002164:Camphor / Q000302:isolation & purification / Q000592:standards*; D002849:Chromatography, Gas; D006077:Government Agencies; D006920:Hygiene; D007564:Japan; D010602:Pharmacopoeias as Topic; D013053:Spectrophotometry
D002164:Camphor