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Big T · December 20, 2011, 07:46 PM

I just opened a one pound can of IMR 4895, stamped E91 on the bottom (1991?) L7867. The can was sealed and stored in a cool, dry basement room. I immediately noticed a significant amount of fine brown dust throughout the power. It left a notable brown dust type substance on my power funnel, and I decided not to use it. I asked a friend and he has had the same thing (not sure if its actually the same stuff) in some 4831. I could just toss it out to play safe, but this stuff isn't that cheap anymore.

Anyone had this experince? Any propellant engineers in the house who understand this potential chemistry and its implications? Thanks much!

December 20, 2011, 07:46 PM	#1
Big T Junior Member Join Date: December 18, 2011 Posts: 3	4895 gone bad? I just opened a one pound can of IMR 4895, stamped E91 on the bottom (1991?) L7867. The can was sealed and stored in a cool, dry basement room. I immediately noticed a significant amount of fine brown dust throughout the power. It left a notable brown dust type substance on my power funnel, and I decided not to use it. I asked a friend and he has had the same thing (not sure if its actually the same stuff) in some 4831. I could just toss it out to play safe, but this stuff isn't that cheap anymore. Anyone had this experince? Any propellant engineers in the house who understand this potential chemistry and its implications? Thanks much!