Demi Moore 911 Whip-It Tape

The L.A. City Attorney recommended that all references to whip-its be redacted from the Demi Moore 911 tape -- and the recommendation was followed ... TMZ has learned.

Sources tell us ... the Deputy City Attorney assigned to the case heard references to whip-its and felt it would be an invasion of privacy if that information was released to the public -- so it was cut out of the tape, along with specific references to other drugs.
TMZ broke the story ... paramedics on scene were told Demi had used whip-its to inhale nitrous oxide just before she lapsed into semi-consciousness and exhibited seizure-like symptoms.

 The person's identity who called 911 is known and it has to be noticed told the dispatcher about the whip-its.