| HMIC | Description |
| D | There is no information in the HMIRS; however, the NSN is in an FSC in Table I of Federal Standard 313 and an MSDS should be available to the user. |
| N | There is no data in the HMIRS and the NSN is in an FSC not generally suspected of containing hazardous materials. |
| P | There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product. |
| Y | Information is in the Hazardous Materials Information Resource System (HMIRS). |