A man has been arrested and charged after allegedly putting hydrochloric acid inside what is understood to be a lubricant dispenser at a gay club in Sydney's north-west. Police said the 62-year-old man went into the Bridge Street premises in Rydalmere on Saturday, filling a dispenser inside a room with the highly corrosive acid. Hydrochloric acid is a strong, corrosive acid which can produce burns, ulcers and scars when put into contact with skin.