Determines the hazard class (1 to 5) of a substance from its R phrases,
its H phrases, its VLA, or the material/process it belongs to, by
consulting Table 1 of the INRS method. It is explored from the most
hazardous class (5) down to the least hazardous (1), and the first
class with a match is returned. If no phrase, VLA or process matches
classes 2 to 5, class 1 is assigned by default (catch-all: "has
phrases but none of the above"), as established by the INRS
methodology.
Usage
inrs_hazard_class(
r_phrases = character(0),
h_phrases = character(0),
process = NULL,
vla = NA_real_
)
Arguments
- r_phrases
Character vector of R phrases (optional).
- h_phrases
Character vector of H phrases (optional).
- process
Character scalar with the material/process (optional).
Compared as a substring (case-insensitive) against the text of
Table 1.
- vla
Numeric. VLA in mg/m3 (optional).
Value
Character scalar ("1" to "5"). Only returns
NA_character_ if no criterion at all was supplied (r_phrases,
h_phrases, process and vla all empty/NA), in which case there
is not enough information to classify.
Examples
inrs_hazard_class(h_phrases = "H335")
#> [1] "2"
inrs_hazard_class(vla = 0.05)
#> [1] "5"
inrs_hazard_class(vla = 200) # falls into class 1 by default
#> [1] "1"
