Bornyl formate occurs in valerian oil and possibly in the oil of Achillea nobilis. It results upon the interaction of borneol on formic acid in the presence of some mineral acid.1) It is a colorless liquid with a strong but pleasant odor. According to the borneol employed, the ester is either dextrogyrate or lsevo-gyrate. The following constants have been recorded in chemical literature: d-Bornyl formate:

B. p. 225 to 230°;2) 98 to 99° (15 mm.); d15o 1,0173). B. p. 90° (10 mm.); d15o 1,013; aD + 31°; nD15o 1,470784). B. p. 106 to 108° (21 mm.), 90° (10 to 11 mm.); d0o 1,027, d22o 1,009; [a]D+48o45'.5)

1-Bornyl formate:

B. p. 106 to 108° (21 mm.); d0o 1,026, d22o 1,009; [a]D - 48°56' (Behal, Ioc. cit.).

B. p. 97° (15 mm.); d 20o/4o 1,0058; [a]D - 40,46°,6)

B. p. 215°; [a]D - 49° (4,55 p. c. solution in alcohol).7)

A technical product examined in the laboratory of Schimmel & Co. and containing 98,8° p. c. ester had the following properties:

B. p. 85 to 86° (7 mm.); d15o 1,0126; aD - 47°32'.