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EC number: 265-232-9
CAS number: 64771-71-7
A combination of normal paraffins having carbon numbers predominantly greater than C10 obtained by urea adduction or molecular sieve processes.
The estimated freshwater fish 28-day NOELR (No Observed Effect Loading Rate) value is 0.139 mg/l based on growth.
aquatic toxicity toward fish under chronic conditions was estimated
using the Petrotox computer model, which combines a partitioning model
used to calculate the aqueous concentration of hydrocarbon components as
a function of substance loading with the Target Lipid Model used to
calculate acute and chronic toxicity of non-polar narcotic chemicals.
Petrotox computes toxicity based on the summation of the aqueous-phase
concentrations of hydrocarbon block(s) that represent a hydrocarbon
substance and membrane-water partitioning coefficients (KMW)
that describe the partitioning of the hydrocarbons between the water and
organism. Results of computer modelling to estimate chronicity in a
28-day freshwater fish study, based on growth, show that this substance
will not produce toxicity at or below its maximum attainable water
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