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EC number: 201-766-0
CAS number: 87-69-4
Tartaric acid and its salts are readily biodegradable in water.
Several studies are available in the scientific literature which
investigated the biodegradation in water of the tartaric acid by means
of different methods, whereas only one study is available for disodium
tartrate and one for calcium tartrate.
All results support the ready biodegradability of these
substances, except for the study performed by Sharma et al which reports
a BOD5/COD ratio just under 0,5 (which is the cut-off value between
ready biodegradability and non-ready biodegradability in accordance with
CLP Regulation) for the tartaric acid. On the whole, it is believed that
this lower value may be due to experimental variability.
Overall, it is considered that the biodegradability of tartaric
acid is the same of that ones of its salts (i.e. monosodium,
monopotassium, sodium potassium, sodium, potassium and calcium tartrate)
and, therefore, the assessment of this endpoint may be jointly performed
using all available data for these substances. Therefore, also the
tartaric acid salts are deemed to be readily biodegradable.
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