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EC number: 204-847-9
CAS number: 127-52-6
The estimated half-life
(DT-50) of the substance in air is 25.6 days.
The substance is
hydrolytically stable in water at ambient pH values (pH 7) and pH 9. It
is unstable at pH 4 and 50°C and 60°C with DT-50 values of 27.0 ± 2.6 s
and 21.3 ± 1.8 days. At 70°C, the estimated DT-50 is 9.6 ± 3.5 days.
The substance will not be
degraded by direct photolysis in water, since it does not absorb light
at wavelengths≥ 290 nm.
The substance is not readily
The substance has an estimated
log Koc of 0.51. This indicates that the substance is not or not
significantly binding to soil, sediments, sludge or other matrices
susceptible for binding, with which the substance will come into
contact. The lack of (significant) adsorption indicates that the
substance is highly mobile, e.g., by run-off from all kinds of solid
surfaces and by leaching through the ground, if reached.
The Henry’s Law constant of
CAS 127-52-6, the main constituent of “CAS 127-52-6 trihydrate” is 0.791
Pa m3/mole, which corresponds to 7.81 x 10-6 (i.e., 0.00000781) atm
m3/mole or 3.19 x 10-4 (unitless). Hence, CAS 127-52-6 is considered
slightly volatile from water at ambient temperature.
Since the water solubility of CAS 127 -52 -6 is very high, it is
unlikely that CAS 127 -52 -6 co-evaporates with water under evaporation
Though the substance is hydrolytically
stable in water at ambient pH, it is unstable under application
conditions, depending on the concentration of the application solution.
The substance is applied as disinfectant in order to eliminate harmful
matters. During application under disinfection conditions, 0.01 g/L
aqueous solutions are decomposition/dechlorinated completely to its
dechlorinated form benzenesulfonamide (BSA) within 5 hours. 90%
decomposition/dechlorination is reached within 30 minutes. Taking into
account that the worst case application concentration is 50 g/L and
assuming a realistic worst case dilution factor of at least 500 into
waster waters (which are typically loaded highly with bacteria and
organic waste) it is obvious that no test material will reach the STP
nor the aquatic environment. Complete dechlorination was confirmed by
treatment of surfaces with 50 g/L, as < 0.025 ppm chlorine was detected
10 cm above the treated surfaces, under worst case ventilation
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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