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EC number: 265-057-8
CAS number: 64741-56-6
A complex residuum from the vacuum distillation of the residuum from atmospheric distillation of crude oil. It consists of hydrocarbons having carbon numbers predominantly greater than C34 and boiling above approximately 495°C (923°F).
an acute oral toxicity study, groups of fasted, Sprague-Dawley rats
(5/sex) were given a single oral dose of Vacuum Residuum in corn oil at
a dose of 20 mL/kg body weight and observed for 14 days. Clinical
observations include: hypoactivity, diarrhea and dark brown / black
staining of the anal region. The oral LD50 was determined to be greater
than 5000 mg/kg body weight in males and females.
study received a Klimisch score of 2 and is classified as reliable with
restrictions because it is an acceptable and a well-documented study
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