Bulk packages, especially dyes, may have appropriate labels, however, labels on small packages may be non-existent or inadequate. As environmentally conscious individuals we can create art in relative safety.
Humans are part of nature.
What can affect us can affect other organisms, primarily by entering our environment through improper use and improper disposal of hazards, contaminating our groundwater and contributing to toxic pollution. High risk groups are pregnant and nursing women, children, persons with chronic heart, kidney, or lung disease, persons with asthma or allergies, the elderly, and animals. The effects of hazards apply to healthy adult humans, not to high risk individuals. In addition, many people have high individual susceptibility to chemicals for heredity reasons or physical or emotional stress. The exposure by pregnant women to even small amounts of many materials can damage a fetus.