Soft coke derived from coal is a porous, low‑density carbon residue produced after the coal is heated in the absence of air. It typically appears as light brown to dark gray granules with a crumbly texture.

When shipping soft coke, containers must be sealed to prevent moisture absorption and avoid contact with water‑rich environments, as the product is susceptible to swelling and loss of strength. Customs clearance often requires a certificate of origin and a standard commercial invoice.