Extract Data from EPA IRIS Database

The extr_iris function sends a request to the EPA IRIS database to search for information based on a specified keywords and cancer types. It retrieves and parses the HTML content from the response.

Usage

extr_iris(casrn = NULL, verbose = TRUE, delay = 0)

Arguments

casrn

A vector CASRN for the search.

verbose

A logical value indicating whether to print detailed messages. Default is TRUE.

delay

Numeric value indicating the delay in seconds between requests to avoid overwhelming the server. Default is 0 seconds.

Value

A data frame containing the extracted data.

Examples

# \donttest{
Sys.sleep(3) # To avoid rate limiting due to previous examples
extr_iris(casrn = c("1332-21-4", "50-00-0"), delay = 2)
#> ℹ Checking Internet Connection...
#> ℹ Internet connection OK...
#> ℹ Quering 1332-21-4 to EPA IRIS database...
#> ℹ Request succeeded with status code: 200
#> ℹ Quering 50-00-0 to EPA IRIS database...
#> ℹ Request succeeded with status code: 200
#> # A tibble: 4 × 9
#>   chemical_name casrn     exposure_route assessment_type critical_effect_or_tu…¹
#>   <chr>         <chr>     <chr>          <chr>           <chr>                  
#> 1 Asbestos      1332-21-4 Inhalation     Cancer          Lung cancer and mesoth…
#> 2 Formaldehyde  50-00-0   Oral           Noncancer       Reduced weight gain, h…
#> 3 Formaldehyde  50-00-0   Inhalation     Cancer          Nasopharyngeal cancer,…
#> 4 Formaldehyde  50-00-0   Inhalation     Noncancer       Decreased pulmonary fu…
#> # ℹ abbreviated name: ¹​critical_effect_or_tumor_type
#> # ℹ 4 more variables: woe_characterization <chr>, toxicity_value_type <chr>,
#> #   toxicity_value <chr>, query <chr>
# }