Research Peptide CAS Numbers, Formulas & Molecular Weights (Reference Table)

Published September 4, 2026Updated September 4, 2026Category: ReferenceStart here: What are research peptides?

In brief. A reference table of CAS Registry Numbers, molecular formulas, molecular weights and residue counts for every research peptide in the Pepta Labs catalog, generated from the current listing data.

This reference table lists the registry and identity data recorded for each compound in the Pepta Labs catalog: CAS Registry Number, molecular formula, molecular weight, residue count and common aliases. It is generated from the current catalog and the verified compound records each time the page is loaded, so it reflects what is listed today. Values are shown as recorded; where a field has not been verified for a compound it is left blank.

How to Read the Columns

CAS number: the Chemical Abstracts Service registry identifier for the substance. A salt form (for example an acetate or trifluoroacetate salt) can carry a different CAS number from the free peptide. Formula: elemental composition of the free peptide. MW: average molecular weight in g/mol. Residues: the number of amino-acid residues in the sequence, blank for non-peptide compounds. Aliases: alternative names and codes under which the same compound appears in the literature and in supplier catalogs.

Reference Table

Compound	Aliases	CAS	Formula	MW (g/mol)	Residues	Product
5-Amino-1MQ	5-Amino-1-methylquinolinium iodide, 5-amino-1-methylquinolinium, 1-methylquinolin-1-ium-5-amine iodide, 5A1MQ, Quinolinium, 5-amino-1-methyl-, iodide	42464-96-0	C10H11IN2	286.11 Da	—	50mg
AOD-9604	AOD9604, AOD 9604	221231-10-3	C78H123N23O23S2	1815.10 Da	16	5mg
ARA-290	—	1208243-50-8	C51H84N16O21	1257.32	—	16mg
BPC-157	BPC 157, Bepecin, PL-14736, PLD-116, PL 10	137525-51-0	C62H98N16O22	1419.53 Da	15	10mg · 20mg
Cagrilintide	—	1415456-99-3	C194H312N54O59S2	4409.00	—	10mg
Cerebrolysin	—	12656-61-0	—	—	—	30mg
CJC-1295 no DAC	—	—	C152H252N44O42	3367.95	—	5mg
DSIP	Emideltide (INN), DSIP nonapeptide, Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu, WAGGDASGE, UNII YN28Z5YZ73	62568-57-4	C35H48N10O15	848.81 Da	9	10mg
Epithalon	—	307297-39-8	C14H22N4O9	390.35	—	10mg
FOXO4-DRI	FOXO4 D-retro-inverso peptide, FOXO4-DRI TFA salt, FOXO4 DRI	2460055-10-9	C228H388N86O64	5358.15 Da	46	10mg
GHK-Cu	Copper tripeptide-1, Prezatide copper, GHK copper, Copper peptide GHK-Cu, Glycyl-L-histidyl-L-lysine copper complex	89030-95-5	C14H22CuN6O4	401.91 Da	3	100mg · 50mg · 80mg
Glutathione	L-Glutathione (reduced), GSH, gamma-L-Glutamyl-L-cysteinylglycine, Reduced glutathione	70-18-8	C10H17N3O6S	307.32 Da	3	1200mg
Ipamorelin	NNC 26-0161, NNC-260161, Ipamorelin acetate, Aib-His-D-2-Nal-D-Phe-Lys-NH2, 2-Methylalanyl-L-histidyl-3-(2-naphthyl)-D-alanyl-D-phenylalanyl-L-lysinamide	170851-70-4	C38H49N9O5	711.85 Da	5	10mg · 5mg
KPV	Lys-Pro-Val, L-Lysyl-L-prolyl-L-valine, H-Lys-Pro-Val-OH	67727-97-3	C16H30N4O4	342.44 Da	3	10mg
Livagen	—	—	C18H31N5O9	461.47	—	20mg
Mazdutide	—	2259884-03-0	C207H317N45O65	4476.06	—	20mg
Melanotan-I	Melanotan I, MT-I, Afamelanotide (INN), CUV1647	75921-69-6	C78H111N21O19	1646.85 Da	13	10mg
Melanotan-II	Melanotan II, MT-II, MTII, Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2	121062-08-6	C50H69N15O9	1024.18 Da	7	10mg
MOTS-C	MOTS-c (human), H-MRWQEMGYIFYPRKLR-OH, MOTSc	1627580-64-6	C101H152N28O22S2	2174.62 Da	16	10mg · 40mg
N-Acetyl Selank Amidate	—	—	C35H60N12O9	792.94	—	10mg
N-Acetyl Semax Amidate	—	—	C39H54N10O10S	854.98	—	10mg
NAD+	Nicotinamide adenine dinucleotide, Nadide (INN/USAN), beta-NAD, Diphosphopyridine nucleotide (DPN), UNII 0U46U6E8UK	53-84-9	C21H27N7O14P2	663.43 Da	—	1000mg · 500mg
PT-141	Bremelanotide (INN), PT141, PT 141, Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH	189691-06-3	C50H68N14O10	1025.17 Da	7	10mg
Retatrutide	—	2381089-83-2	C221H342N46O68	4731.36	—	10mg · 15mg · 20mg · 30mg · 60mg
Selank	TP-7, Thr-Lys-Pro-Arg-Pro-Gly-Pro, TKPRPGP, Selanc, UNII TS9JR8EP1G	129954-34-3	C33H57N11O9	751.87 Da	7	10mg
Semax	Met-Glu-His-Phe-Pro-Gly-Pro, MEHFPGP, UNII I5FAL2585H	80714-61-0	C37H51N9O10S	813.90 Da	7	10mg
Sermorelin	GRF(1-29)-NH2, Sermorelin (INN/BAN)	86168-78-7	C149H246N44O42S	3357.93 Da	29	10mg
SNAP-8	Acetyl octapeptide-3, Acetyl glutamyl heptapeptide-3, Acetyl octapeptide-1, SNAP8, Ac-Glu-Glu-Met-Gln-Arg-Arg-Ala-Asp-NH2	868844-74-0	C42H72N16O15S	1073.20 Da	8	10mg
SS-31	Elamipretide, MTP-131, Szeto-Schiller peptide 31, RX-31, D-Arg-Dmt-Lys-Phe-NH2	736992-21-5	C32H49N9O5	639.78 Da	4	25mg · 50mg
TB-500	Thymosin beta-4, Timbetasin, Tbeta4, Thymosin beta4 acetate, TB4	77591-33-4	C212H350N56O78S	4963.44 Da	43	10mg
Tesamorelin	TH9507, TH-9507, (3E)-hex-3-enoyl-GRF(1-44)-NH2	218949-48-5	C221H366N72O67S	5135.86 Da	44	10mg
Thymosin Alpha-1	Thymalfasin, Thymosin alpha 1, Talpha1, alpha1-Thymosin	62304-98-7	C129H215N33O55	3108.26 Da	28	10mg
Thymulin	FTS, Thymuline	78922-62-0	C33H54N12O15	858.86 Da	9	10mg
Tirzepatide	—	2023788-19-2	C225H348N48O68	4813.53	—	10mg · 15mg · 30mg · 40mg · 60mg
VIP	VIP (human, porcine, rat), HSDAVFTDNYTRLRKQMAVKKYLNSILN, UNII 6J2WVD66KR	37221-79-7	C147H237N43O43S	3326.84 Da	28	10mg

35 compounds listed. Registry data is compiled from the product records and from the verified compound reference entries; a blank cell means the value has not been verified for that entry, not that it does not exist.

Notes

Molecular weight refers to the free peptide unless the product page states a salt form; see TFA vs acetate salts and net peptide content for the difference. For expected mass spectrometry values (monoisotopic mass and m/z by charge state) computed from these formulas, see the expected mass table. The reported HPLC purity for each compound is shown on its product page, and the independent analytical report (COA) for the sourced production run is available by email request.

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35 research compounds. Independent analytical reports (COA) available by email request. Free US shipping.

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Research Peptide CAS Numbers, Formulas & Molecular Weights (Reference Table)

How to Read the Columns

Reference Table

Notes

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