White Soft Paraffin BP
White Soft Paraffin BP (British Pharmacopoeia) is a purified mixture of
semi-solid hydrocarbons derived from petroleum. It is odorless, tasteless, and
white in color with a smooth, greasy texture. It is widely used in
pharmaceutical formulations as an emollient, moisturizer, and occlusive agent.
Commonly found in ointments, creams, and other topical applications, it helps
to soften the skin, protect it from moisture loss, and deliver active
ingredients effectively.
British Pharmacopoeia (BP) Specification for White Soft
Paraffin:
- Description: A white, soft, unctuous mass;
practically odorless and tasteless.
- Solubility: Insoluble in water and ethanol;
soluble in light liquid paraffin and slightly soluble in ether and
chloroform.
- Melting Point: Between 38°C and 56°C.
- Acidity or Alkalinity: Passes test (should be
neutral).
- Polycyclic Aromatic Hydrocarbons (PAHs):
Complies with limits; tested for carcinogenic compounds.
- Sulphated Ash: Not more than 0.05%.
- Consistency and Appearance: Homogeneous,
smooth, and free from gritty particles.
- Microbial Quality: Should comply with limits
if intended for use on broken skin.