Its salts. Nothing is wrong with it, no matter how long you store it. Here's what the lable reads.
Percipitation of component #1: To check for percipitation, wich may occur during winter shipment (or storage), insert a section of plastic rigid tubing or rod to the bottom of the bottle. if you can feel "ice like'' crystals, percipitation has occurred. Restore by either storing it at 70-75 deg. F. for 48 hours and then shaking the bottle, or by placing the closed botlle in a plastic bag (to protect the lable) and immersing it in warm water (100-115 deg. F.) for one hour and then shaking the bottle .
Immersing the bottle in hot water works best for me, so good luck. But, if you still want to trough it away I will gladly take it. :splitspin