Looks up each risk phrase (R) or hazard phrase (H) in the COSHH Essentials
hazard group assignment table (groups A to E) and returns the most
unfavourable group found. Any phrase not listed explicitly in groups B-E is
assigned to group A, following the default rule of the original method.
Arguments
- phrases
Character scalar containing one or more phrases separated
by commas, e.g. "H315, H319" or "R20/21/22".
Value
Character scalar with the group ("A" to "E"), or
NA_character_ if phrases is empty or NA.
Examples
coshh_grade("H315, H319")
#> [1] "A"
coshh_grade("R23/24/25")
#> [1] "C"
