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+# Create a chemical compound object for FOCUS Step 1 calculations
+
+Create a chemical compound object for FOCUS Step 1 calculations
+
+## Usage
+
+``` r
+chent_focus_sw(
+  name,
+  Koc,
+  DT50_ws = NA,
+  DT50_soil = NA,
+  DT50_water = NA,
+  DT50_sediment = NA,
+  cwsat = 1000,
+  mw = NA,
+  max_soil = 1,
+  max_ws = 1
+)
+```
+
+## Arguments
+
+- name:
+
+  Length one character vector containing the name
+
+- Koc:
+
+  Partition coefficient between organic carbon and water in L/kg.
+
+- DT50_ws:
+
+  Half-life in water/sediment systems in days
+
+- DT50_soil:
+
+  Half-life in soil in days
+
+- DT50_water:
+
+  Half-life in water in days (Step 2)
+
+- DT50_sediment:
+
+  Half-life in sediment in days (Step 2)
+
+- cwsat:
+
+  Water solubility in mg/L
+
+- mw:
+
+  Molar weight in g/mol.
+
+- max_soil:
+
+  Maximum observed fraction (dimensionless) in soil
+
+- max_ws:
+
+  Maximum observed fraction (dimensionless) in water/sediment systems
+
+## Value
+
+A list with the substance specific properties