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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Overview of physico-chemical properties


Freezing/Melting temperatureEC A.1 OECD 102356°C 
Boiling temperature Waived: The melting point is above 300°C.Statement
DensityEC A.3 OECD 1092.34 at 23°C 
Particle size distribution (granulometry)OECD 110Light microscopic examination revealed that the Potassium chlorate sample contained a significantly amount of fine powder and no fibres. 
ISO 2591-1This observation is confirmed by sieving the sample over a 100 µm sieve. The majority of the product (78.3 m/m %) appeared to be < 100µm .
ISO 3310-1The characteristics of the PSD of the fraction < 100 µm are:
 Characteristics of the PSD
 d10 [µm] 2.2
 d50 [µm] 17.3
 d90 [µm] 74 
Vapour pressure Waived: The melting point is above 300°C. Statement
Partition coefficientRA from sodium chlorate (CAS:7775 -09 -9)log Kow < -2 
Water solubilityEC A.6OECD 10569.9 g/l 
Surface tension Waived:based on the structure, surface activity is not expected and surface activity is not a desired property of the material.Statement
Flash-point Waived: The study cannot be conducted because the substance is an inorganic solid. Statement
Auto flammability   
EC A.16no relative self-ignition temperature
FlammabilityEC A.10

Not Flammable solid

No pyrophoric, self-heating properties and no reaction with water are anticipated

Explosive propertiesEC A.14 / DSC screeningWaived based on screening DSC test, not explosiveStatement
Oxidizing propertiesEC A.21 / screening testOxidizing, Cat.1
Stability in organic solvents and identity of relevant degradation products Waived: The study does not need to be conducted if the substance is inorganic. Statement
Dissociation constant Waived: Chlorate decomposes on acidification.Statement
Estimated pKa = -1 to -3 due to its strong acidity.
Viscosity Waived: Potassium chlorate is a solid substance. Testing viscosity is therefore technically not feasible.Statement


For CLP there are additional data requirements that are not covered by REACH:

Gases under pressure



Reaction with water

Self-reactive substances and mixtures

Corrosive against metals

 organic peroxide

Waiving, not a gas

Waiving, not a pyrophoric

Waiving, no reaction with water anticipated

Waiving, because the substance is a pure oxidizing solid

Data available, Conclusive but not sufficient for classification.

waiving, not an organic peroxide