Appearance:Red powder Chemical classification:Synthetic iron oxide red a-Fe2O3 Pigment index:Pigment Red 101 (77491) CAS number:1309-37-1 EEC number:215-168-2 Molecular formula:Fe2O3 GB/T1863-2008 iron oxide pigment standard (MOD ISO1248:2006). Indicator nameunit Index value Test Methods Color difference 1.0 Relative tinting strength%95ï½?105Titanium dioxide dilution(1:10) Iron content (expressed as Fe2O3)%â?¥95ISO1248:2006 Oil absorptiong/100gAgreedISO787-5 Sieve residue325mesh%0.11ISO787-7 Water soluble%0.3ISO787-3 105 ° C volatiles%1.0ISO787-2 pH value AgreedISO787-9 1000 ° C / 0.5 h heat loss%5ISO55913 Particle shape spherical Primary primary particleD50m0.4-0.7 Seismic densityg/cm30.8-1.1 densityg/cm34.8 Lightfastnesslevel7-8 Weather resistancelevel5 Heat resistance600 The above are the main technical indicators of the products, other indicators refer to the national standards of the products.