Hazard Category 0 - non-toxic: water,
1 - irritant: salt water, 4<pH<10, alcohol
2 - critical: pH<4,pH>10, fixative
3 - catastrophic
Levels of Containment - redundant design: 'one more' than hazard category
- adequate factor of safety: only one
Design Examples:
Plant Habitat with water, soil, plants Hazard Cat. 0: one level of containment
caution: soil particles = eye irritant, may be Cat. 1
Insect Habitat with animals, food Hazard Cat. 0: one level of containment
Light Source Using Fluorescent Lamp Hazard Cat. 0 or 2, depending on Mercury content, but:
frangible materials: glass containment: need at least one additional level of containment
Test Tube with bacteria and fixative Hazard Cat. 2: three levels of containment, but:
may use two levels during observation if containment verifiable and no failure cause
Materials Compatibility:
MSDS web sitesMSDS (Materials Safety Data Sheet) lookup website
Cole Parmer - Chemical compatibility database
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