Solidifying Substance means a noxious liquid substance which:
1 in the case of a substance with a melting point of less than 15°C which is at a temperature of less than 5°C above its melting point at the time of unloading; or
2 in the case of a substances with a melting point of equal to or greater than 15°C which is at a temperature of less than 10°C above its melting point at the time of unloading. <Annex II, Chapter 1, Regulation 1>.
Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. Legislation