1 | Description | Clear, colourless, viscous liquid having a slight, characteristic tatse. Is practically odorless. Absorbs moisture when exposed to moist air. | Clear colourless, viscous liquid having a slight, characteristic taste. Is practically odorless. Absorbs moisture when exposed to moist air. (USP) |
2 | Solubility | Complies | Misible with water,with ethanol (96%),with acetone, and with chloroform.Soluble in ether and will dissolve many essential oils, but is immiscible with fixed oils. (USP) |
3 | Identification (By IR) | Complies | IR spectra of the sample should be concomitant with IR spectra of the standard. (USP) |
4 | Identification (Diethylene glycol) | Not detected | NMT 0.10% (USP) |
5 | Identification (Ethylene glycol) | Not detected | NMT 0.10% (USP) |
6 | Identification (By GC Chromatogram) | Complies | The retention time of the propylene glycol peak of the sample solution corresponds to that of the standard solution. (USP) |
7 | Identification (by Relative density, 20°C) | 1.037 | 1.035 - 1.040 (Ph.Eur) |
8 | Identification (By Refractive index, 20±0.5°C) | 1.432 | 1.431 - 1.433 (Ph.Eur) |
9 | Identification (By Boiling Point) | 185°C | 184° - 189°C (Ph.Eur) |
10 | Identification(By Melting point) | 123°C | Crystals should melt between 121 °C to 128 °C. (Ph.Eur) |
11 | Clarity and colour of solution | Complies | Clear and colorless. |
12 | Specific gravity, 25°C | 1.036 | 1.035 - 1.037 (USP) |
13 | Relative density, 20°C | 1.037 | 1.035 - 1.040 (Ph.Eur) |
14 | Refractive index (20°C ± 0.5°C) | 1.432 | 1.431 - 1.433 (Ph.Eur) |
15 | Assay | 99.98% | NLT 99.5% (USP) |
16 | Residue on ignition | 0.003% | The weight of residue should NMT 2.5 mg (0.005% max.) (USP) |
17 | Chloride (Cl) | Less than 70ppm | 70ppm max. (USP) |
18 | Sulphate (SO4) | Less than 60ppm | 60ppm max. (USP) |
19 | Acidity | Complies | Not more than 0.05 mL of 0.1 M sodium hydroxide should require to change the colour of the indicator to blue. (Ph.Eur) |
20 | Oxidising substances | Complies | Not more than 0.2 mL of 0.05 M sodium thiosulfate should required. (Ph.Eur) |
21 | Reducing substances | Complies | The solution does not change its appearance. (Ph.Eur) |
22 | Water | 0.055% | NMT 0.2% (USP) |
23 | Total aerobic microbial count | Less than 100 cfu/ml | 100 cfu/ml max. (In-house) |
24 | Total Yeast & mold count | Less than 10 cfu/ml | 10 cfu/ml max. (In-house) |
25 | Bacterial endotoxins | Less than 0.012 EU/mg | NMT 0.012 EU/mg (In-house) |