DSIP (delta sleep-inducing peptide) is a nine-amino-acid neuropeptide, Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu, first isolated in 1977 from the blood of rabbits in induced sleep.

What is DSIP studied for?

DSIP is studied in research on sleep, especially delta (slow-wave) sleep, and on stress-hormone regulation. Its receptor and exact mechanism are still not established.

Every batch goes to an independent lab. The current batch was tested across three vials for purity (RP-HPLC), identity (LC-MS), net peptide content, endotoxins, heavy metals and sterility. Each batch's certificate of analysis is published on the lab results page.

How should DSIP be stored?

Keep the sealed vial in the refrigerator at 36–46°F (2–8°C), dry and away from light. As a freeze-dried powder it tolerates room temperature for weeks, which is why it ships without ice. Once reconstituted, keep it refrigerated between uses. More in our guide, Do peptides need to be refrigerated?

How much DSIP is in a vial?

DSIP comes as a white lyophilized powder in a 10mg vial.

Is DSIP for human use?

No. DSIP is sold for laboratory research use only.

10mg · 99%+ Purity

DSIP

DSIP, or Delta Sleep-Inducing Peptide, is a synthetic nonapeptide with the sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu.

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COA Tested 99%+ Purity Research Grade

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99.531% purity View COA

Certificate of Analysis

DSIP 10mg · 3 vials tested by an independent lab · RP-HPLC / LC-MS

Batch 2026-KV312

Latest

99.531%

Average purity

Labeled content: 10mg
Net content: 10.82mg (+8%)
Vials tested: 3
Endotoxins: Pass
Heavy metals: Pass
Microbial sterility: Pass
Method: RP-HPLC / LC-MS
Tested: Jul 16, 2026

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Batch DP172

99.94%

Average purity

Labeled content: 10mg
Net content: 11.52mg (+15%)
Vials tested: 1
Endotoxins: Pass
Method: HPLC-UV
Tested: Apr 21, 2026

View full COA

Compound Information

Chemical and structural properties

What it is

What is DSIP?

DSIP, or Delta Sleep-Inducing Peptide, is a synthetic nonapeptide with the sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu.

Class: Neuropeptide (nonapeptide)
Also known as: Delta sleep-inducing peptide
Form: White lyophilized powder
Use: Research use only

Molecular profile

Compound Structure

CAS number: 62568-57-4
Molecular formula: C35H48N10O15
Molecular weight: 848.8 g/mol
Amino acids: 9
Sequence: Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu

PubChem · CID 68816

Storage

Storage & Stability

Store cold
Protect from light
Keep dry

Lyophilized (powder) 2–8°C (36–46°F) Refrigerate · −20°C for long-term storage

Reconstituted 2–8°C (36–46°F) Refrigerate · use within 28 days

Solubility: Soluble in bacteriostatic water

DSIP Overview

A nine-amino-acid neuropeptide first isolated from rabbits in induced sleep, and a fixture of sleep research ever since.

Technical overview

DSIP (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) was isolated in 1977 by Schoenenberger and Monnier. It has since been found in the brain, pituitary and blood of several species. No dedicated receptor has been identified, and it is thought to act through several signalling systems rather than one.

Research applications

DSIP is studied in research on sleep, especially delta (slow-wave) sleep, as well as stress-hormone regulation, circadian rhythm and body-temperature control.

FAQs

What is DSIP?

DSIP (delta sleep-inducing peptide) is a nine-amino-acid neuropeptide, Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu, first isolated in 1977 from the blood of rabbits in induced sleep.
What is DSIP studied for?

DSIP is studied in research on sleep, especially delta (slow-wave) sleep, and on stress-hormone regulation. Its receptor and exact mechanism are still not established.
How is DSIP tested?

Every batch goes to an independent lab. The current batch was tested across three vials for purity (RP-HPLC), identity (LC-MS), net peptide content, endotoxins, heavy metals and sterility. Each batch's certificate of analysis is published on the lab results page.
How should DSIP be stored?

Keep the sealed vial in the refrigerator at 36–46°F (2–8°C), dry and away from light. As a freeze-dried powder it tolerates room temperature for weeks, which is why it ships without ice. Once reconstituted, keep it refrigerated between uses. More in our guide, Do peptides need to be refrigerated?
How much DSIP is in a vial?

DSIP comes as a white lyophilized powder in a 10mg vial.
Is DSIP for human use?

No. DSIP is sold for laboratory research use only.