Drop melting point, °C: 53-59; Cone penetration @ 25°C 160-180; Congealing point, °C: 47-53. Rather firm white petroleum jelly with silky, medium-fibred structure and glossy surface. It is odorless and tasteless and stable to light and oxidation. It keeps its good structure during processing. It is highly refined and meets the purity requirements of most internationally known pharmacopoeias, such as Ph. Eur., USP, etc.