GHS secondary labels are those labels which are applied to secondary containers, primarily used when the hazardous substance or mixture is transferred into other containers for workplace use. GHS secondary labels are also required on containers for substances/mixtures manufactured in the workplace, solely for workplace use. Secondary containers vary in type or size, e.g. small ampules, reaction vessels, spray bottles, portable containers, etc.
There is greater flexibility in the requirements for GHS secondary labels. This provides the competent authority the leverage to use alternative means of hazard communication so long as the information correctly conveys the hazardous information provided on the original supplier label. Signs, placards, batch-sheets, and operational procedures may be used when traditional labelling is not possible due to size restrictions or inaccessibility of containers, as long they identify the products identity and any associated hazards
It is strongly recommended that employers use the GHS labelling system for containers that require secondary labels as it maintains uniformity. Nonetheless, an alternative system of hazard communication may be used, provided that workers are trained to have an adequate understanding of the labelling system.