Ultra High Purity

Dry, odour-free, free of visual residues
Wall-Wash with methanol conforms to:
• Water miscibility test (ASTM D 1722) passes (Hydrocarbon Test)
• colour PtCo (ASTM D 1209) or APHA 10 or less
• Chlorides less than 2 ppm
• Permanganate time test above 50 min (PTT Test)
• UV spectrum passes
• Non-volatile matter less than 10 ppm (NVM)
• Last cargo by Gas Chromatography or other suitable method less than 2 ppm (GC)

Depending on the purity of the cargo grade the required chloride standard can be much lower (e.g. 0,5 ppm)

If a low chloride standard is required tanks and lines should be finally rinsed/flushed with DI-water

Visual inspection of the tank and wall wash with Methanol to perform above tests except NVM and/or GC (see below)
Master to confirm that the on-board tests were conducted via a tank cleanliness certificate.

Following tests/analysis are not possible on board:
Non-volatile matter (NVM)
Gas Chromatography (GC) or other laboratory test

Visual inspection of tanks and wall wash.
Charterer may accept the cleanliness certificate provided by the Master, but will most likely require an in-tank inspection and wall-wash test.