Which SS-31 fill has the lowest price per mg at Webb Peptides?

SS-31 50 mg, at $0.91 per mg ($457.00 for 500 mg).

How much does the largest SS-31 box hold?

SS-31 50 mg: 10 × 50 mg vials make 500 mg, for $457.00.

Does a bigger SS-31 fill always cost less per mg?

At Webb Peptides, yes for every step of this ladder: each larger fill works out lower per mg than the one below it.

Price per mg

SS-31 price per mg

Webb Peptides lists SS-31 in 2 vial fills, from 10 mg to 50 mg, each sold by the box of 10 vials. Per mg, the SS-31 50 mg box is the lowest at $0.91 per mg. Every figure below comes from the live listings.

SS-31 fills compared
Listing	Fill	Box contents	Box price	Per vial	Per mg	Against the lowest
SS-31 10 mg	10 mg	100 mg	$113.00	$11.30	$1.13	+24%
SS-31 50 mg	50 mg	500 mg	$457.00	$45.70	$0.91	lowest

Step by step up the ladder

10 mg → 50 mg: 5 times the contents for $344.00 more a box; per mg the price falls by 19%.

With shipping added

Shipping is $90.00 for up to 4 boxes in one order, so its share of each box depends on the order size. Per mg including that share:

Listing	1 box alone	4 boxes in the order
SS-31 10 mg	$2.03	$1.35
SS-31 50 mg	$1.09	$0.96

The arithmetic is in the note on landed cost.

Answers from these figures

Which SS-31 fill has the lowest price per mg at Webb Peptides?: SS-31 50 mg, at $0.91 per mg ($457.00 for 500 mg).
How much does the largest SS-31 box hold?: SS-31 50 mg: 10 × 50 mg vials make 500 mg, for $457.00.
Does a bigger SS-31 fill always cost less per mg?: At Webb Peptides, yes for every step of this ladder: each larger fill works out lower per mg than the one below it.

Webb Peptides supplies materials for in-vitro laboratory research only, not for human or veterinary use and not for diagnostic or therapeutic use. Webb sells nothing intended to be consumed.