the safety of carbon black

Carbon black should be stored in a clean, dry, uncontaminated area away from exposure to high temperatures, open flame sources and strong oxidizers (e.g., chlorates, bromates, and nitrates). Since carbon black will adsorb moisture and chemical vapors, it should be stored in closed containers.
Spill clean-up and general housekeeping are very important for controlling Carbon black exposures. Carbon black dust spreads easily in air through virtually any air current or movement. Additionally, becauseCarbon black is a pigment, it may stain exposed surfaces. Housekeeping procedures that avoid the production of dust or generation of fugitive emissions in the process are highly recommended. Dry vacuuming, with appropriate filtration, is the preferred method for removing surface dust and cleaning spills. Dry sweeping should be avoided. Bulk carbon black should always be covered or contained. Care should be taken to avoid generating conditions that may result in unnecessary exposure.
There is no evidence to suggest that acute exposure to Carbon black may result in life threatening injury or illness. Carbon black is not a respiratory irritant, as defined by the Occupational Safety and Health Administration (OSHA), and does not produce respiratory or dermal sensitization. Ingestion is an unlikely method of accidental exposure. Like many dusts, inhalation may initiate a bronchial response among individuals with pre-existing lung conditions.