Table 1 The chemical and physical tests conducted
From: Forensic implication of seized drug imitating methamphetamine with mileage in crime
Physical examination | ||||
S. no | Physical properties | Observation of seized substance | Standard MA. hydrochloride | Ref |
1 | State | Crystalline | Crystalline | (Methamphetamine-National Medical Library n.d.) |
2 | Color | White | White | |
3 | Odor | Odorless | Odorless | |
4 | Nature | Hygroscopic | Hygroscopic | |
5 | Melting point | 48.3 °C | 170 °C | |
6 | Solubility | Water | Water, ethanol, diethyl ether, and chloroform | |
7 | pH | Acidic | Alkaline | |
Chemical examination | ||||
S. no | Chemical tests | Observation and inference of seized substance | Standard MA. hydrochloride | Ref |
1 | Marquis test | No reaction—MA not detected | Orange, slowly turning to brown | (unodc stnar 34) |
2 | Simon’s test | No reaction—MA not detected | Deep blue color | |
3 | Flame test for sodium ions | Yellow-colored flame—positive | No reaction | (Svehla 1979) |
4 | Zinc uranyl acetate test for sodium ions | Yellow precipitate—positive | No reaction | |
5 | Iodine solution test for thiosulphate ions | Color of iodine disappears gradually—positive | No reaction | |
6 | Test with silver nitrate for thiosulphate ions | White ppt which changes to black on standing—positive | No reaction | |