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| Date | Update description |
| 2011-07-14 | Merged in "added hydrogen" (A00130) |
| 2006-09-29 | Taken from the original Gold Book, published in version 1.0.0 of the XML Gold Book. |
| File | Revision | Date |
| I03004.xml | 7 | 2011-08-03T12:20:06 |
| I03004-1.svg | 4 | 2005-01-31T15:16:23 |
| I03004-2.svg | 4 | 2005-01-31T15:16:23 |