DSIP 5mg ships as a 5mg vial of lyophilized powder, held in stock in the United States and priced at $38 per vial. Purity is 98% or higher. Bundle pricing lowers the per-vial price automatically in the cart: $36 each at two vials, $34 each at three, and $32 each at five. No code to enter, no minimum order, and no waiting on a restock email.
What researchers look for in a DSIP supplier
DSIP is a simple peptide to synthesize and a surprisingly difficult one to buy consistently. Most of the friction has nothing to do with the molecule. It is stock that is listed but not held, prices that move between quote and checkout, and a card that gets declined before an order goes through.
Stock that is actually on the shelf. Every DSIP vial we list is physically held in the United States, not listed against a lead time on somebody else’s synthesis run. The counter on the product page reads live inventory, so when it shows seven vials, seven vials are on the shelf.
Published pricing, not a quote thread. $38 a vial is the price on the page and the price at checkout. Bundle discounts of 5%, 10% and 15% apply automatically at two, three and five units. Nothing is gated behind an email exchange or a wholesale application form.
Card payment that clears in one pass. Visa and Mastercard are taken on the site itself. Card declines are common enough on research peptide orders that buyers plan around them, so this matters more than it should: one card entry, one confirmation, and the order is in the queue.
A consistent purity standard across the catalog. DSIP is held to 98% or higher purity as a lyophilized powder. Material that does not meet the standard is not listed. The specification sits on the product page next to the sequence, formula and CAS number, checkable before you order.
Product details
- Compound: DSIP – Delta Sleep-Inducing Peptide (Nonapeptide)
- Presentation: 5mg lyophilized powder in a sealed vial
- SKU: CRP-DSIP-5
- CAS number: 62568-57-4
- Molecular weight: 848.81 Da
- Price: $38.00 per vial, with bundle pricing at two, three and five units
- Availability: in stock, ships from the United States
- Supplied for: laboratory research use only
DSIP 5mg, $38 per vial, in stock now
Buy DSIP 5mgBrowse the catalogLyophilized, 98% or higher purity, held in United States stock. Same-day dispatch on orders in before 4PM ET.
What DSIP is, in research terms
DSIP, delta sleep-inducing peptide, is a linear nonapeptide with the sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu, written WAGGDASGE in single-letter code. Its molecular formula is C35H48N10O15, its molecular weight is 848.81 Da, and its CAS number is 62568-57-4. The chain carries no disulfide bridge, no C-terminal amide and no non-proteinogenic residues, which makes it one of the plainer neuropeptides to synthesize and to characterize. The single tryptophan at position one gives a clean absorbance signal at 280 nm.
That structural simplicity is what makes DSIP useful on the bench. It is cheap to make at scale, easy to quantify, and it degrades quickly in aqueous media, which turns it into a convenient control substrate for peptidase and stability assays. Its main role now is as the reference arm in analog comparisons. Phosphorylated DSIP, D-amino-acid substituted variants and amidated forms are run against the native nonapeptide, so the unmodified peptide is the baseline every substitution is scored against.
The published preclinical literature runs across three assay classes. Cortical EEG recording in rabbits, rats and cats with spectral analysis of delta-band power is the classic in vivo readout. Perfused pituitary and hypothalamic explant preparations with radioimmunoassay of pituitary hormones cover the endocrine strand. Serum and brain homogenate incubations analyzed by HPLC and LC-MS cover degradation and fragment identification. How to Store Research Peptides covers the practical handling side of that work in more detail.
Our free DSIP research guide collects the reconstitution table, the storage schedule and a summary of those lines of investigation into one printable document. free research guide for DSIP to download it. No purchase is required, and every compound in the catalog has one.
Bundle pricing, printed on the page
| Quantity | Per vial | Order total | Savings |
|---|---|---|---|
| 1 vial | $38 | $38 | – |
| 2 vials | $36 | $72 | $4 |
| 3 vials | $34 | $102 | $12 |
| 5 vials | $32 | $160 | $30 |
DSIP is the baseline every analog is scored against, so phosphorylated, D substituted and amidated variants all need the native nonapeptide running beside them. It also degrades quickly in aqueous media, which is exactly why peptidase and stability assays consume it faster than most reagents. Two vials price 5% lower per vial, three 10%, five 15%, always rounded down to the dollar and never requiring a code. Five vials take the total past the $150 mark, where US shipping is free.
US stock, international shipping and same-day dispatch
Orders placed before 4PM ET are dispatched the same day, seven days a week. Weekends included, holidays included. Tracking is emailed the same day the parcel leaves, not the following morning and not when the carrier posts its first scan. Because the DSIP is already on a shelf in the United States, a domestic order has no synthesis wait and no customs hold.
Standard Shipping inside the United States is $12 and arrives in 2 to 5 business days, and it is free once an order clears $150. Expedited 2-3 Day is $39 and Overnight is $95. Standard International is $40 flat over a 10 to 20 business day window, free on orders of $500 and above, and Express International is $100 flat at 5 to 10 business days.
Storage and handling
Sealed and lyophilized, DSIP holds at minus 20C for long-term storage and 2 to 8C for short-term. The dry cake tolerates transit temperatures, so the vial ships without a cold chain. Let a cold vial warm to room temperature before opening, so moisture does not condense onto the powder. In solution it is far less stable: hold it at 2 to 8C, dark and aliquoted. storage and handling page covers the full schedule, and reconstitution calculator runs the concentration math for any diluent volume.
Checkout, payment and support
Checkout runs on the site, with no redirect to a third-party wallet and no crypto conversion step in the middle. The DSIP vial count in your cart is checked against live stock as the order is placed, so a five vial order does not come back the next day as a partial shipment. The confirmation email lands immediately.
Support replies within one business day. If a DSIP vial arrives with a cracked stopper, a broken seal or no visible cake in the bottom, send a photo of the vial and the packing slip and we replace it or refund it. No returns form, no restocking argument.
Order DSIP 5mg
DSIP 5mg is $38 a vial at 98% or higher purity, lyophilized, with seven vials in United States stock right now. Bundle pricing takes the per-vial price to $36, $34 and $32 at two, three and five units. Order before 4PM ET for same-day dispatch.
Three vials at $34 each, five at $32
Buy DSIP 5mgFree DSIP research guideBundle pricing applies automatically in the cart. Five vials at $160 total ships free inside the United States.
More buying guides
Every compound in the catalog has one of these pages, with the same published pricing and the same dispatch terms.
Frequently asked questions
What is DSIP?
DSIP, or delta sleep-inducing peptide, is a linear nonapeptide with the sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu, molecular formula C35H48N10O15, molecular weight 848.81 Da and CAS number 62568-57-4. Published preclinical work has examined it in cortical EEG recordings in rodent and rabbit models, in perfused pituitary and hypothalamic preparations, and in serum and brain homogenate degradation assays. It is supplied as a 5mg lyophilized powder for laboratory research use only.
Why buy DSIP from Core Research Peptides?
Stock is held in the United States and the counter on the product page reads real inventory. Pricing is published: $38 for a single vial, with automatic bundle discounts at two, three and five units. An order in before 4PM ET is packed and handed to the carrier that day. Card payment clears in one pass, and support replies within one business day.
What purity is your DSIP?
DSIP is supplied at 98% or higher purity as a lyophilized powder in a 5mg vial. That is the standard across the catalog, and material that does not meet it is not listed. The specification sits on the product page alongside the sequence, molecular formula, the molecular weight of 848.81 Da and CAS number 62568-57-4.
How fast do you ship DSIP, and what does shipping cost?
Orders go out the same day when they are placed before 4PM ET, seven days a week, and the tracking number is emailed the day the parcel moves. Domestic rates are $12 for Standard Shipping at 2 to 5 business days, free above $150, then $39 for Expedited 2-3 Day and $95 for Overnight. Because the vials sit in United States stock, a domestic DSIP order never crosses a border.
Do you ship DSIP internationally?
Yes. Standard International is a $40 flat rate over a 10 to 20 business day window, and it is free once the order reaches $500. Express International is a $100 flat rate at 5 to 10 business days. Those windows count transit only. Time a parcel spends with a customs authority sits outside them, and import rules are the buyer’s responsibility.
Do you offer bundle pricing on DSIP?
Yes, and it applies automatically in the cart with no code. Two vials take 5% off at $36 each, three take 10% off at $34 each, and five take 15% off at $32 each. Five vials come to $160, which clears the $150 free Standard Shipping threshold in the United States. A coupon code stacks on top of bundle pricing.
How should DSIP be stored?
Keep the sealed lyophilized vial at minus 20C for long-term storage, or 2 to 8C if it is in current use. Bring a cold vial up to room temperature before the seal is broken, so humidity does not settle on the cake. Reconstituted DSIP is much less durable: hold it at 2 to 8C, keep it dark, aliquot it and do not freeze-thaw it repeatedly.
