Anti-caking composition of sodium chlorate

A method of packaging a powder composition comprising sodium chlorate, the method comprising the steps of:

• providing a container;
• and
• adding to the container from about 98.2 to about 99.7 weight % sodium chlorate and from about 0.3 to about 1.0 weight % of an anti-caking agent, wherein the anticaking agent is anhydrous sodium carbonate, anhydrous sodium hydrogen carbonate, sodium carbonate monohydrate or a mixture of any of the foregoing,
• wherein optionally the sodium chlorate and the anti-caking agent are added stepwise without substantial mixing thereby forming a heterogenous mixture comprising two or more phases, wherein a first phase comprises ≥about 50 weight % sodium chlorate and a second phase comprises ≥about 50 weight % of the anti-caking agent.

A package comprising a powder composition consisting of:

• from about 98.5 to about 99.7 weight % of the sodium chlorate based on the dry weight of the powder composition;
• from about 0.3 to about 1.0 weight % of the anti-caking agent based on the dry weight of the powder composition;
• optionally from 0 to about 0.5 weight % of other inorganic compounds based on the dry weight of the powder composition;
• wherein the total amount of sodium chlorate, the anti-caking agent, and the optional water and/or other inorganic compounds sums up to about 100 weight %;
• and
• wherein the anticaking agent is anhydrous sodium carbonate, anhydrous sodium hydrogen carbonate, sodium carbonate monohydrate or a mixture of any of the foregoing.