30 CFR § 47.42
When an operator must make a label, the label must--
(a) Be prominently displayed, legible, accurate, and in English;
(b) Display appropriate hazard warnings;
(c) Use a chemical identity that permits cross-referencing between the list of hazardous chemicals, a chemical's label, and its MSDS; and
(d) Include on labels for customers, the name and address of the operator or another responsible party who can provide additional information about the hazardous chemical.