Hydrogen was a champion racehorse.

By the imported stallion Delville Wood (Imp) out of Sweet Sound (Aus) by Magpie (Aus) he was foaled in 1948 and trained throughout his career by Ted Hush.

Hydrogen failed by a neck of being the first horse to win three Cox Plates when beaten in 1951 as a three-year-old. He won the subsequent two editions of the race in 1952 and 1953.

An outstanding three-year-old he developed into one of Australia’s finest weight-for-age performers and the highest stakes earner (£59,444) at the time eclipsing the record previously held by Phar Lap.

A winner over six furlongs (1,200m) to two miles (3,200m) he won many major races including the 1951 VATC Caulfield Guineas, 1951 VRC Victoria Derby, 1951 STC Rosehill Guineas, 1951 AJC Craven Plate, the 1952 and 1953 MVRC W.S. Cox Plate, 1953 VRC LKS Mackinnon Stakes and the 1953 QTC Brisbane Cup.

He was retired to stud in 1954.