Detergent bottles are usually made from high density polypropylene (HDPE) with recycling number 2.
Look on the bottom of the bottle. The number 1 in the recycling triangle tells you it is a PET bottle.
The number on the bottom of a water bottle, usually inside a triangle, is a code that identifies the specific kind of plastic the bottle is made of. The bottles can then be sorted to assure all of the same kind of plastic goes together for recycling. Avoiding the mixing of different plastics in the recycling process makes a better, more valuable recycling stream.
The answer depends on the bottle.
A PET plastic bottle (number 1) will last for months, probably years. Just make sure you wash it with warm water and detergent to prevent bacteria growth, especially the mouthpiece. That's all you have to worry about.
The number of loads you can get out of a 50 oz bottle of laundry detergent depends on the concentration of the detergent and the size of each load. On average, a 50 oz bottle can provide around 32-50 loads.
There are several different kinds of plastic that need to be recycled separately. Labeling plastic products with a number makes it easier to sort the recycling items so that only compatible items are recycled together.
the most common examples of primary recycling (reuse) are with glass containers, where milk and drinks bottles are returned to be cleaned and used again. reuse is not widely practiced in relation to plastic packaging - plastic products in general end to be discarded after first use. however, there are examples of reuse in the marketplace. for example, a number of detergent manufacturers market refill sachets for bottled washing liquids and fabric softeners. consumers can refill and hence reuse their plastic bottles at home. Goodship V (2007) Introduction to plastics recycling - second edition
You can determine if a plastic item is made of polyethylene or polypropylene by looking for the recycling symbol on the item. Polyethylene is usually labeled with the number 2 inside the recycling symbol, while polypropylene is labeled with the number 5.
Plastic bags (white grocery store bags, green garbage bag etc.) are generally made of polypropylene or polyethylene. Both these materials are made of carbon and hydrogen formed into monomers and then polymerized into the corresponding plastic.
Common symbols found on plastic containers to indicate recycling include the chasing arrows symbol with a number inside, the recycling symbol with arrows in a triangle, and the term "recycle" itself.
Synthetic polymers have recycling numbers to indicate the type of plastic they are made of and help with sorting and recycling processes. The numbering system, known as resin identification codes, was introduced to standardize recycling efforts and determine the appropriate recycling method for each polymer. This allows for efficient sorting and recycling of different types of plastics, reducing waste and promoting circular economy practices.
There are different recycling numbers on different plastics because all plastics are different. Many recycling facilities need to separate these types of plastics because they all melt at different temperatures and can be reused for different things.