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EC number: 297-025-4
CAS number: 93281-13-1
Direct Black 168 is a orange powder at 20
°C and 1013 hPa. No melting/boiling reactions were recorded up to 300
°C; vapour pressure can be considered as negligible.
The test item is very water soluble (i.e.
194 g/l) and the partition coefficient log Pow was determined to be
lower than -4.
Based on the available information, the
substance resulted to be non
AND PHYSICOCHEMICAL STATE
Black 168 is a black organic powder at 20 °C and
1013 hPa. It is characterized particles
having a diameter between 128 and 1.5 μm; in
detail, particles with a diameter below 4 μm are
ca 2 %. No melting/boiling reactions were
recorded up to 300 °C, using the capillary
method in liquid bath.
AND PARTITION COEFFICIENT
partition coefficient was
first evaluated by using the
shake flask method,
according to the OECD
Guideline 107. The value of
LogPow obtained shows that
the expected Pow lies
outside the range of flask
shaking method and it was
suggested that it should be
estimated by the calculation
method. The calculation was
performed by the fragment
method and the Log Pow was
calculated as the sum of its
values (fi), multiplied by
the frequency of their
occurence (ai), plus the sum
of correction terms for
The value calculated was
water solubility was
assessed by the shake flask
method. The substance
resulted to be very soluble
in water, i.e. 194 g/l at 20
°C and pH 4.8.
self-ignition temperature for Direct Black 168 is
The substance does
not ignite and not propagate combustion neither by
burning with flame or by smouldering along 200 mm
of the powder train within the 4 -minute test
substance is incapable of reacting exothermically
with combustible materials
and it is not thermally or shock sensitive
nor is sensitive to friction.
does not meet the criteria to be considered as
thermal stability and air stability of the
substance were investigated using DTA method; the
sample shows neither without nor with air any peak
between room temperature and 150 °C.
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