| Compounds | Maximum molecular weight | Minimum molecular weight | Mean molecular weight |
| HE MHE MHA MHD MHF MHG MHH MHL MHM MHP MHR MHS MHY | 18,000 12,500 12,500 - 13,500 12,500 - 135,00 12,500 - 13,500 12,500 - 13,500 12,500 - 13,500 12,500 - 13,500 12,500 - 13,500 12,500 - 13,500 12,500 - 13,500 12,500 - 13,500 12,500 - 13,500 | 7000 4500 3500 - 4500 3500 - 4500 3500 - 4500 3500 - 4500 3500 - 4500 3500 - 4500 3500 - 4500 3500 - 4500 3500 - 4500 3500 - 4500 3500 - 4500 | 13,000 - 14,000 8500 - 9500 8500 - 9500 9000 - 10,000 8500 - 9500 8500 - 9500 8500 - 9500 8500 - 9500 8500 - 9500 8500 - 9500 8500 - 9500 8500 - 9500 8500 - 9500 |