Dihexa vs Semax
Strength for strength, Dihexa costs less per mg at the two strengths both are offered in: at 5mg $0.572 per mg against $0.908 (DH5 in 50-box lots, XA5), at 10mg $0.426 per mg against $0.740 (DH10 in 50-box lots, XA10). By the single box, Semax is the only option, from $0.740 per mg at 10mg (XA10); every Dihexa line is special order. Dihexa is offered in 2 strengths (5mg to 10mg), Semax in 2 (5mg to 10mg); Semax has 1 on the shelf today, Dihexa none (special order, 50-box minimum). The least either takes: one box of XA5 at $45.40, three for a first order’s $100 minimum, against 50 boxes of DH5, $1,430.00 of goods.
Prices revised · USD per box of ten · freight included to US addresses from $1,000 of goods · COA per batch · research use only · New to us? What can be checked before you pay
What differs between Dihexa and Semax
Two short synthetic chains from different starting points, and the practical difference is which of them can oxidise. Dihexa is an angiotensin IV-derived oligopeptide analogue capped at both ends, an N-hexanoyl group at one and a 6-aminohexanamide at the other, C27H44N4O5 at 504.7, CAS 1401708-83-5. Semax is the ACTH 4-7 core with a Pro-Gly-Pro tail, C37H51N9O10S at 813.9, CAS 80714-61-0. Read the two formulas: Semax has a sulfur and Dihexa has none. That sulfur is the methionine, which can oxidise to the sulfoxide. Both are offered in 5 and 10 mg.
| Detail | Dihexa | Semax |
|---|---|---|
| Best per mg, by the box | Special order only | $0.740 per mg (XA10) |
| Best per mg, special order included | $0.426 per mg (DH10, 50 boxes) | $0.740 per mg (XA10) |
| Price per box sold singly | Special order only | $45.40 to $73.96 |
| In 50-box lots, per box | $28.60 to $42.59 | None |
| Strengths offered | 2: 5mg, 10mg | 2: 5mg, 10mg |
| Highest price per mg | $0.572 per mg (DH5, 50 boxes) | $0.908 per mg (XA5) |
| On the shelf today | 0 of 2 strengths | 1 of 2 strengths |
| Range | Longevity & Nootropic | Longevity & Nootropic |
| Form | Lyophilised powder | Lyophilised powder |
| Molecular weight | 504.7 g/mol | 813.9 g/mol |
| Formula | C27 |
C37 |
| CAS number | 1401708-83-5 | 80714-61-0 |
| Release limit | Purity ≥ 98.0 % by RP-HPLC | Purity ≥ 98.0 % by RP-HPLC |
Each line’s own page: Dihexa and Semax. Reading either certificate: how to read a peptide COA. Checking a batch: verify a batch number. Every line priced: the price list. Checking another supplier’s quote: the price per mg calculator.
Strength for strength
Every strength both are offered in, per mg, the lower figure in bold; stock as this page was opened.
| Strength | Dihexa | Semax |
|---|---|---|
| 5mg | $0.572 per mg (lower) (DH5, special order, 50 boxes) | $0.908 per mg (XA5, low stock) |
| 10mg | $0.426 per mg (lower) (DH10, special order, 50 boxes) | $0.740 per mg (XA10, ships in 2 weeks) |
Every strength of both
Compared elsewhere
Semax vs Selank
At 10mg: $0.740 per mg each; 2 strengths each.
Pinealon vs Semax
At 10mg: $0.405 per mg (Pinealon, 50-box lots) against $0.740; 3 strengths against 2.
Cerebrolysin vs Semax
$0.032 per mg against $0.740 per mg at best (Cerebrolysin, a 50-box line); 1 strength against 2.
Adamax vs Semax
At 10mg: $1.156 per mg against $0.740; 2 strengths each.
Questions
What is the difference between Dihexa and Semax?
Two short synthetic chains from different starting points, and the practical difference is which of them can oxidise. Dihexa is an angiotensin IV-derived oligopeptide analogue capped at both ends, an N-hexanoyl group at one and a 6-aminohexanamide at the other, C27H44N4O5 at 504.7, CAS 1401708-83-5.
Which is cheaper per mg, Dihexa or Semax?
Strength for strength, Dihexa costs less per mg at the two strengths both are offered in: at 5mg $0.572 per mg against $0.908 (DH5 in 50-box lots, XA5), at 10mg $0.426 per mg against $0.740 (DH10 in 50-box lots, XA10).
What are the molecular weights of Dihexa and Semax?
Dihexa’s calculated average mass is 504.7 g/mol and Semax’s 813.9 g/mol, 309.2 apart; in electrospray the ions come at m/z 505.7 (1+) for Dihexa against 814.9 and 408.0 (1+ and 2+) for Semax. On each certificate the measured mass is matched to the line’s calculated average mass, within about one unit, as how to read a peptide COA sets out.
Are Dihexa and Semax made to the same specification?
Yes: both are supplied to purity not less than 98.0 percent by RP-HPLC and net content within 5 percent of label, and each certificate reports those with a measured mass, matched to the calculated figure on each sheet. The retest date is on the batch record. What differs is each molecule’s own chemistry, described on its compound 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.