There is no effect from the type of milk on the spoilage rate when you consider the traditional types - fat free, 2% fat, or full fat. Organic milk, which is produced without the use of antibiotics and disinfectants, usually contains more bacteria. As bacteria are responsible for milk spoilage, organic milk may have a shorter shelf life.
for my hypothesis i think fat free milk will spoil first
I think seafood spoils quicker than milk, but milk spoils due to the bacteria that are naturally found in milk. Pasteurization eliminates pathogens and reduces the overall bacterial load. Since it is not sterilized, milk will eventually spoil even when refrigerated.
Milk can last unrefrigerated for about 2 hours before it spoils.
Unopened milk can sit out for about two hours before it spoils.
When milk spoils, the pH will go down. This is due to microbial action that increases lactic acid in the milk. This is also why milk tastes sour when it has spoiled.
Unrefrigerated milk typically lasts for about two hours before it spoils.
butter milk
Thawed milk is good for about 5-7 days in the refrigerator before it spoils.
Milk can last for about 2 hours at room temperature before it spoils.
Milk can sit out at 70 degrees for about 2 hours before it spoils.
Defrosted milk typically lasts 3-5 days in the refrigerator before it spoils.
The spoilage of milk is sometimes called souring.