A two-part number assigned by EPA to identify each pesticide product registration (e.g., 1253-79). The first number is company number, the second number (after the dash) is the product number. This registration number must appear on the product's label.
EPA REGISTRATION NUMBER (EPA REG. NO)
Meaning of EPA REGISTRATION NUMBER (EPA REG. NO) in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012