| Section: 9 | Organic dyes and pigments (OD) | Page: 336 | 
| IRUG filename: IOD00336 | Data type: Infrared | IRUG material class: Organic dyes and pigments (OD) | 
| Sample type: Reference material | Common name(s): Natural Red 9 (NR9), Anthraquinone, CI58005 | Trade name(s): Alizarin Red S | 
| CAS name: 9,10-Dihydro-3,4-dihydroxy-9,10- | Sample source 1: BDH Chemicals Ltd. | Source location 1: Poole, UK | 
| Sample identifier 1: CI#58005 | Application: ATR (attenuated total reflection) | Mode: Tran | 
| Originating institution name: National Museums and Galleries of Wales | Originating institution acronym: NMGW | Molecular formula: C14H7NaO7S.H2O | 
| CAS registry no: 71538-26-6 |