lee, I received some Fomadon R09 today from freestyle today and hope to try it this week. I bought Calbe R09 apx 4 years ago and after not using it for 2 years i decided to develope a roll of film and was to tired to heat up the water for D76 so i grabbed the Calbe out of the cabinet. The bottle was only 1/3 filled and 4 years old and i could not see any difference in the negatives compared to 4 years prior when it was new. I was told the Calbe had only a 6 month life span after the air hit it, well 4 years later its still perfect.