  Negative Charge |
|||
| Positive Charge | |||
| Name | CHUO-CCA 1 | CHUO-CCA 23 | CHUO-CCA 3 |
| Chemical Classification |
Nigrosine Base （C.I. Solvent Black 7） |
Nigrosine Base with resin |
|
| Appearance | Black Powder | ||
| pH | 4.5～6.0 | 6.0～8.0 | 4.0～6.0 |
| Ames | Negative | ||
| CAS | ○ | ||
| TSCA | ○ | ||
| EINECS | ○ | ||