Erythorbic Acid or erythorbate, formerly known as isoAscorbic Acid and D-araboascorbic acid, is a stereoisomer of ascorbic acid.
And its chemical properties have many similarities with Vc, but as an antioxidant, it has the inimitable advantage that Vc do not have: First, it is superior to the anti-oxidation than Vc, therefore, mixed the Vc, it can effectively protect the properties
| Item | Specification -- FCC IV | 
| Name | Erythorbic Acid | 
| Appearance | White odorless, crystalline powder or granules | 
| Assay(on dry basis) | 99.0 - 100.5% | 
| Chemical Formula | C6H8O6 | 
| Specific rotation | -16.5 --- -18.0 º | 
| Residue on ignitionc | < 0.3% | 
| Loss on drying | < 0.4% | 
| Particle size | 40 mesh | 
| Heavy metal | < 10 ppm max | 
| Lead | < 5 ppm | 
| Arsenic | < 3 ppm |