Establishes the requirements for this product. Describes sampling, methods of test, packing and marking. Annex A covers the determination of loss in mass at 103 degrees centigrade, Annex B the determination of allyl isothiocyanate, Annex C the determination of p-hydroxybenzyl isothiocyanate by means of the colorimetric method, Annex D the determination of p-hydroxybenzyl isothiocyanate by means of theargentimetric method and Annex E includes recommendations concerning storage and transport conditions.