Aromatic amines -sulfone linkage-
These monomers are a curing agent for epoxy resin. The epoxy resin made from these monomers is excellent in heat resistance and flexibility. SO2 is better performance in bonding carbon-fibers.
3,3'-Diaminodiphenylsulfone

| Features | The epoxy resin made from 3,3’DAS is excellent in heat resistance and flexibility |
| Application | Heat-resistant epoxy resin for a curing agent |
| Purity % | 99 Min |
| Appearance | Pale yellow powder |
| Melting point | 171 degrees C |
| CAS No. | 599-61-1 |
| TSCA | Have inventory |
| EINECS/ELINCS | 209-967-5 |
| ENCS | (3)-2163 |
| ISHL | (3)-2163 |
4,4’-Diaminodiphenylsulfone

| Features | The epoxy resin made from 4,4’DAS is excellent in heat resistance and flexibility |
| Application | Heat-resistant epoxy resin for a curing agent |
| Purity % | 95 Min |
| Appearance | Pale yellow powder |
| Melting point | 178 degrees C |
| CAS No. | 80-08-0 |
| TSCA | Have inventory |
| EINECS/ELINCS | 201-248-4 |
| ENCS | (3)-2163 |
| ISHL | (3)-2163 |
Diaminodihydroxydiphenylsulfone

| Features | The epoxy resin made from BS-DA is excellent in photosensitive and flexibility |
| Application | Photosensitive epoxy resin for a curing agent |
| Purity % | 99 Min |
| Appearance | Pale brown powder |
| Melting point | 232 degrees C |
| CAS No. | 7545-50-8 |
| TSCA | No inventory |
| EINECS/ELINCS | 231-428-8 |
| ENCS | No inventory |
| ISHL | 4-(14)-352 |
Bis[4-(3-amonophenoxy)phenyl]sulfone

| Application | Stabilizer for heat sensitive paper Intermediate for polyimide-siloxane |
| CAS No. | 30203-11-3 |
| TSCA | Have inventory |
| ENCS | (3)-2174 |
| ISHL | (3)-2174 Lab sample |
Bis[4-(4-amonophenoxy)phenyl]sulfone

| Application | Intermediate for epoxy resin and polyimide |
| CAS No. | 13080-89-2 |
| TSCA | Have inventory |
| ENCS | (3)-4190 |
| ISHL | 4-(14)-207 Lab sample |

