Cognitive & Sleep Research

DSIP

Delta sleep-inducing peptide

Also known as Delta sleep-inducing peptide, Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu.

A nonapeptide first isolated from rabbit cerebral venous blood, studied in sleep-architecture, stress-response and neuroendocrine models.

Current lot: SN-DSP-2606
Purity: 99.33% by HPLC
Tested: Jun 27, 2026
Stocked in: United States, Canada

Synamino Sciences research vial with a silver cap on a slate-blue background

Ships from

Vial size

$32.00

USD · 5 mg · In stock

Qty

Order by 2:00 PM PT for same-day dispatch from Reno, Nevada. 1–3 business days by USPS Priority and UPS. Free shipping over $150.00.

For laboratory research use only. Not for human or veterinary use.

About the compound

Delta sleep-inducing peptide was named for the slow-wave sleep changes observed in early animal work. It remains a widely used tool in sleep-regulation and stress-hormone research.

Supplied as a lyophilized powder.

Studied inSleep architecture · Stress response · Neuroendocrine models

Certificate of analysis

The certificate for the lot currently shipping. Every vial in that lot carries the same lot number on its label.

Certificate of analysis

DSIP · 5 mg

Lot SN-DSP-2606 · tested Jun 27, 2026

99.33%

Purity by HPLC

Labeled: 5 mg
Measured: 5.1 mg
Panel: 6 passed · 2 reported
Laboratory: Independent ISO/IEC 17025 accredited laboratory

Assay	Method	Result	Outcome
Appearance	Visual	White lyophilized powder	Pass
Purity	HPLC · spec ≥ 98%	99.33%	Pass
Net peptide content	HPLC	5.1 mg	Reported
Identity	LC-MS	Confirmed	Pass
Heavy metals	ICP-MS	Not detected	Pass
Sterility	USP <71>	No growth	Pass
Endotoxin	LAL · USP <85>	< 0.05 EU/mL	Reported
Residual solvents	GC-HS	Within limits	Pass

Specification and storage

CAS number: 62568-57-4
Molecular formula: C35H48N10O15
Molecular weight: 848.8 g/mol
Residues: 9
Sequence: WAGGDASGE
Reference record: PubChem entry

Storage

Sealed lyophilized vials are stable at room temperature for short periods; store at 2–8 °C for routine use.
For long-term storage keep sealed vials at −20 °C, protected from light and moisture.
Reconstituted solutions should be refrigerated at 2–8 °C and used within the period defined by your laboratory's protocol.

Literature

Peer-reviewed publications on this compound. Provided for reference; they are not claims about this product.

01
Journal of Neurochemistry · 2006
Delta sleep-inducing peptide (DSIP): a still unresolved riddle
Kovalzon VM, Strekalova TV
02
Peptides · 1986
Delta-sleep-inducing peptide (DSIP): an update
Graf MV, Kastin AJ
03
Experientia · 1981
The influence of synthetic DSIP (delta-sleep-inducing-peptide) on disturbed human sleep
Schneider-Helmert D, Schoenenberger GA

Studied alongside

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Research notice

DSIP is supplied for in vitro laboratory research and analytical use by qualified professionals. It is not a medicine, supplement or cosmetic, has not been evaluated by any regulator, and is not for human or veterinary use. Published findings cited on this page are provided for reference and are not claims about this product.