When a Safety Data Sheet (SDS) is uploaded to the application, it automatically searches for the H-Codes (Section 2) and the CAS numbers (Section 3). The H-Codes and CAS numbers are used to assign the hazard rating through the following steps: 

1. Each CAS number is submitted via the ChemForward API. ChemForward will return either a rating from A-F or a “?”, meaning the CAS number has not been assessed by them. The A-F rating maps one-to-one to the RBA rating of A = very Low, B=Low, C=Moderate, D=High, F=Very High. When ChemForward returns a “?” the CAS number is assigned a “moderate” rating. In case of multiple CAS numbers, the highest rated one is then assigned as the overall risk for the product. 
   1. If there are no CAS numbers, the system uses the H-Code to assign a hazard rating to the overall product. The mapping between H-Codes and Hazard Rating can be found in Appendix 4: GHG H-Statement Ratings (1-5)
   2. If the system finds neither a CAS number nor H-codes available for the chemical, it assigns a low hazard rating by default. 
      1. If a CAS number is found: The system retrieves the chemical's rating using the ChemForward (footnote- replacing Green Screen benchmark) database, to which RBA are one-to-one mapped, which uses a 1-5 rating scale (previously A-F – please see table below). 
      2. If ChemForward has not assessed the CAS number, it returns a "?". In this case, the system assigns a moderate (3) hazard rating as the chemical has not been assessed by ChemForward yet and no hazard rating has been assigned. 
      3. If multiple CAS numbers are found, the product with the highest hazard rating is assigned to the product. 
      4. If no CAS number is found, the system reviews H-codes from Section 2 of the safety data sheet to determine the chemical hazard rating. If the system finds neither a CAS number nor H-codes available for the chemical, it assigns a low (2) hazard rating by default.