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EC number: 204-847-9
CAS number: 127-52-6
Appearance: Solid powder of white to
light yellow colour
with a faint chlorine odour.
Melting Point: 189°C (temperature of
Boiling Point: 189°C (temperature of
Relative density: 1.484 ± 0.04 at
20°C ± 0.1 °C.
Particle Size distribution (sieving
method using woven wire cloth and perforated metal plate): Inhalable
coarse and fine particles
(< 10 µm) account for < 0.06 %.
pressure of CAS 127 -52 -6 "trihydrate”: 1536 Pa (20° ± 0.1) and 1976 Pa
(25 ± 0.1°C). This indicates intermediate to high volatility from dry,
non-adsorbing surfaces (≥ 5.2 x 10-3Pa). The vapour
pressure of CAS 127-52-6 is 2.44 x 10-9Pa (0.00000000244).
This indicates non volatility from dry, non-adsorbing surfaces (≤ 1.33 x
pressure of 1536 Pa will not to be used for the chemical safety
assessment since it is considered unlikely that CAS 127-52-6
co-evaporates with water from drying surfaces due to its high water
solubility (see below).Instead
the value of CAS 127 -52 -6, i.e. 0.000000002 Pa will be applied.
Partition coefficient n-octanol/water:
log Pow = 0.14 ± 0.29 at pH = 7.0 and at a temperature of 26°C.
Water solubility of “127-52-6
trihydrate”: 221.2 g/L (20°C). This indicates that the substance is
highly water soluble. The water solubility of CAS 127-52-6 is 292 g/L
indicating that the substance is highly water soluble.
Solubility in organic solvents: Very
sparingly soluble in ether and chloroform. Soluble in 20 parts ethanol
yielding turbid solution.
Surface tension: 70 mN/m (20 ± 0.5 °C).
Flash-Point: Not determined. Substance
is a solid.
Auto-Flammability: Not determined.
Boiling point > 189°C (temperature of decomposition).
Flammability: Not highly flammable.
Oxidizing properties: Not oxidizing
Stability: Stable during 5 years at
temperatures between 15°C and 25°C; stable during 14 days at 54°C;
Stable during 6 months at 40°C, 1°C and -18°C.
Reactivity towards container materials
(PE): Inert towards Polyethylene (PE).
PH of a 1% aqueous solution at 24.5°C:
10.3 ± 0.1
Dissociation: The substance does not dissociate protons
based on its molecular structure. Hence an acetic dissociation constant
cannot be provided. The pKa of CAS 80 -16 -0, i.e.,
N-chlorobenzenesulphonamide is 1.88 ± 0.4. CAS 80 -16 -0 is the molecule
where the sodium atom of the CAS 127-52 -6 trihydrate has been replaced
by a hydrogen atom. Dissociation of the sodium salt in water causes pH
10 of a 1% solution.
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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