Insulin syringes 1 mL, 31G x 8 mm, U-100 (pack of 10)

In brief: ALTA PEPTIDES supplies Insulin Syringes 1 mL (31G x 8 mm, U-100, pack of 10) as packs of 10 for £6.99, supplied as manufactured, with no certificate of analysis, held in UK stock and dispatched the same working day before 1pm. Supplied for laboratory research only, not for human consumption.

New to Insulin Syringes 1 mL? Read our guide, Insulin syringes explained: sizes, gauges, the U-100 scale and laboratory use, for what it is, what the research covers and how it is handled.

What they are

Standard 1 mL U-100 insulin syringes with a fixed 31-gauge, 8 mm needle, individually sealed, sold in packs of ten. The U-100 scale reads 100 units per millilitre, so each unit is 0.01 mL, which is the scale used throughout the peptide literature and in our calculator.

Why 1 mL and 31G

A 1 mL barrel gives the widest useful range for measuring reconstituted solutions; 0.5 mL and 0.3 mL syringes exist but limit the volume. 31G is fine enough to puncture a vial stopper cleanly many times without coring it. The fixed needle has minimal dead space, so less solution is wasted per draw.

A 31G insulin syringe with a 1ml barrel is the configuration used for almost all peptide reconstitution work, which is why we stock this one size.

Using them in the laboratory

Swab the stopper, draw the required units, expel air, and use once. Sharps go in a proper sharps container, never household waste. Sold as laboratory consumables.

Insulin Syringes 1 mL price (UK)

Prices include VAT. Shipping is £4.95 by Royal Mail Tracked 48, free on orders over £75, and sealed items can be returned within 14 days. Ships from UK stock with the lot certificate for the vial you receive.

Quality and testing

Every lot of Insulin Syringes 1 mL is released with its certificate of analysis published on our certificates page against the lot number on the vial label. The certificate for the current lot is pending publication, and ALTA's own independent third-party test of the lot is pending; both are added to the certificates page as they arrive. Specification: Sterile, individually sealed, supplied as pack of 10.

Lot traceability

Every Insulin Syringes 1 mL vial carries a printed lot number and expiry. The same lot number appears on the certificate of analysis for that lot on our certificates page, which names who issued it (the manufacturer's QC laboratory for a batch certificate, or the outside laboratory for a third-party report) so it can be checked directly. ALTA's own independent test of each lot is published on the same row as it arrives. If the number on your vial does not match a certificate on our site, contact support before using it. Certificates are kept online for the life of the product plus two years.

Related products

Bacteriostatic Water, Alcohol Prep Swabs, BPC-157, and everything else in Water & Accessories or the full range. Reconstitution supplies: bacteriostatic water, insulin syringes and alcohol swabs.

Related reading in the Journal

• Insulin syringes explained: sizes, gauges, the U-100 scale and laboratory useWhy a 1 mL insulin syringe is the standard tool for measuring small volumes of diluent, what the numbers on the packet mean, and how to handle and dispose of them.
• Does filtering peptides remove bacteria? Sterile filtration explainedPassing a peptide solution through a 0.22 micron syringe filter removes bacteria and fungi; it does not remove viruses, endotoxin or chemical contaminants, and it can remove some of the peptide. What sterile filtration is for and where it fits with bacteriostatic water and lot testing.
• Bacteriostatic water explained: what it is, how it differs from sterile water, and where to get it in the UKThe diluent every peptide laboratory keeps on the shelf: what the benzyl alcohol does, why the 28-day rule exists, when plain sterile water is the better choice, and what to look for when buying it in the UK.
• How to reconstitute peptides: a laboratory guideWhich diluent to use, how to work out the volume for a target concentration, and the handling steps that keep a lyophilised peptide intact.
• What is PT-141? Bremelanotide, the brain-acting peptide behind Vyleesi, and what the trials showPT-141, or bremelanotide, is a seven-amino-acid ring-shaped peptide that acts on melanocortin receptors in the brain rather than on blood flow. It was approved in the US in 2019 as Vyleesi for low sexual desire in premenopausal women, after two trials found small but real improvements; nausea was common. It is not licensed in the UK. What it is, what the trials found and where it stands.

Handling and buying guides: How to store peptides, and how long lyophilised peptides last at room temperature, How to read a peptide certificate of analysis.

Handling and storage

Room temperature. Keep sealed until use. Allow the vial to reach room temperature before opening to avoid condensation on the powder. Reconstitute with bacteriostatic water added slowly down the wall of the vial; do not shake. Our calculator covers the arithmetic.