MOTS-C vs SS-31
MOTS-C is cheaper per mg here: $0.631 per mg at its best-priced strength (MS40) against $0.729 per mg for SS-31 (2S50), 13 percent less. MOTS-C is offered in 4 strengths (10mg to 40mg), SS-31 in 2 (10mg to 50mg); 3 and 2 of those are on the shelf today.
Prices revised · USD per box of ten · freight included from $1,000.00 an order · COA per batch · research use only
Sixteen residues against four, and the mass gap says it: MOTS-C is C101H152N28O22S2 at 2,174.6, CAS 1627580-64-6; SS-31 is C32H49N9O5 at 639.8, CAS 736992-21-5, better than three times lighter. The formulas also say which one ages. MOTS-C carries two sulfur atoms, so a certificate for it has an oxidation product to watch as the vial gets older; SS-31 has no sulfur at all and nothing in it to oxidise, which is why its purity figure barely moves. SS-31 is built from residues that are not standard, a D-arginine and a dimethylated tyrosine among them. On this list MOTS-C is offered in four strengths from 10 to 40 mg and SS-31 in two, 10 and 50 mg, so the per-milligram comparison below is across quite different vial sizes.
| MOTS-C | SS-31 | |
|---|---|---|
| Range | Longevity & Nootropic | Longevity & Nootropic |
| Strengths offered | 4: 10mg, 15mg, 20mg, 40mg | 2: 10mg, 50mg |
| Price per box of ten | $72.72 to $252.43 | $83.10 to $364.62 |
| Best price per mg | $0.631 per mg (MS40) | $0.729 per mg (2S50) |
| Dearest price per mg | $0.727 per mg (MS10) | $0.831 per mg (2S10) |
| On the shelf today | 3 of 4 strengths | 2 of 2 strengths |
| Form | Lyophilised powder | Lyophilised powder |
| Average mass | 2174.6 | 639.8 |
| CAS number | 1627580-64-6 | 736992-21-5 |
| Release limit | Purity ≥ 98.0 % by RP-HPLC | Purity ≥ 98.0 % by RP-HPLC |
Every strength of both
| Code | Compound | Strength | Per box | Per unit | Stock |
|---|---|---|---|---|---|
| MS10 | MOTS-C | 10mg x 10 vials | $72.72 | $0.727 per mg | Low stock |
| MS15 | MOTS-C | 15mg x 10 vials | $102.84 | $0.686 per mg | Made to order, 2 weeks |
| MS20 | MOTS-C | 20mg x 10 vials | $131.93 | $0.660 per mg | Low stock |
| MS40 | MOTS-C | 40mg x 10 vials | $252.43 | $0.631 per mg | In stock |
| 2S10 | SS-31 | 10mg x 10 vials | $83.10 | $0.831 per mg | In stock |
| 2S50 | SS-31 | 50mg x 10 vials | $364.62 | $0.729 per mg | In stock |
Compared elsewhere
The same two lines against the others they are usually weighed with.
Questions
Which is cheaper per mg, MOTS-C or SS-31?
MOTS-C, at $0.631 per mg for its best-priced strength (MS40) against $0.729 per mg for SS-31 (2S50), 13 percent less. Compare at the vial size you will actually use; the gap changes with strength.
Which comes in more strengths, MOTS-C or SS-31?
MOTS-C, with 4 against 2. Every strength is a separate line with its own code, price and stock state.
Can MOTS-C and SS-31 go in one order?
Yes. Any lines can share an order; the minimum is $300 of goods per order, or $100 on a first order, and one sealed box of ten per line. Lines on the shelf ship in 1 to 2 business days; made-to-order lines follow in about two weeks, at no extra freight.
Are MOTS-C and SS-31 tested to the same specification?
Yes: purity not less than 98.0 percent by RP-HPLC, identity by mass, water content, net content within 5 percent of label, and a retest date, with a certificate of analysis per batch. What differs is what each certificate has to look for, which is set by the molecule and described on each compound’s own page.
Structural facts from each compound’s sheet and profile; prices and stock from the list at the moment this page was opened. How to compare strengths on price.