pE-22-28 calculator

10 mg in 2 mL = 5 mg/mL; 10 units on a U-100 syringe holds 0.5 mg.

Sizes on sale: 10mg. Choose a vial, the water and the amount per draw; prices are the lowest current US offers.

search a compound or a supplier’s vial

amount in the vial

bacteriostatic water added

amount per draw

syringe · picked to fit the draw

price, vial size and certificate correction

vial price (optional)

USD

Lowest current US offer for this size.

vial holds (optional)

Most 2–15 mg vials hold 3 mL.

measured content on the COA

From the lot certificate; it replaces the label amount.

or HPLC purity

5 mg/mL

10 units holds 0.5 mg

concentration: 5 mg/mL
per unit: 50 mcg per unit
full draws per vial: —
cost per draw: —

the working

10 mg ÷ 2 mL = 5 mg/mL

If this is a prescription, the dose and volume on your pharmacy label take priority. Ask your pharmacist about any mismatch.

cheapest way to buy it

vendor	size	price	$/mg	checked	calculate with this vial, or view it
Amino USA	10mg	$50.00	$5.00	2026-11-06	view, PE-22-28 10mg at Amino USA, opens in a new tab
American Peptides	10mg	$70.00	$7.00	2026-11-06	view, PE-22-28 10mg at American Peptides, opens in a new tab
Cenexa Labs	10mg	$76.99	$7.70	2026-11-06	view, PE-22-28 10mg at Cenexa Labs, opens in a new tab

In-stock US offers checked in the last 7 days, before shipping. The featured partner is a paid placement and is labelled; order here is by price per mg.

updated Nov 4, 2026 · exact arithmetic, checked against 21 worked cases · prices from offers checked in the last 7 days

animal studies only · cited sources

doses of PE-22-28 used in research

No human studies; evidence is mouse depression models (Djillani et al. 2017). These are the amounts specific labels and studies used, linked to each source. They are references, not recommendations; a prescription label takes priority.

Doses of PE-22-28 used in labels and published studies
source	who	amount and schedule	route
Mouse study (Front Pharmacol 2017): 3.0 ug/kg IP daily for 4 days animal study · 2017 · PMID:28955242	Mice in depression models (forced swim, learned helplessness, corticosterone)	3 mcg/kg once daily 4 days (sub-chronic) Intraperitoneal injection (3.0-4.0 ug/kg/day across analogs). Acute single doses of 3.0-4.0 ug/kg i.p. and 1 mg/kg by gavage were also tested. Animal dose as published; not a human dose and not converted.	other

Sources checked Nov 4, 2026.

PE-22-28 10mg in 2 mL

amount to syringe units

PE-22-28 10 mg in 2 mL: amount to syringe units
amount	mL	U-100 units	U-40 units
100 mcg	0.02	2	0.8
250 mcg	0.05	5	2
500 mcg	0.1	10	4
1 mg	0.2	20	8
2 mg	0.4	40	16
2.5 mg	0.5	50	20
5 mg	1	100	40

One unit on a U-100 syringe is 0.01 mL; on a U-40 it is 0.025 mL.

every PE-22-28 vial size on sale

reconstitution chart

Concentration and amount per 10 units for PE-22-28 vial sizes and water volumes
vial	1 mL water	2 mL water	3 mL water	5 mL water
10 mg	10 mg/mL 10 units = 1 mg	5 mg/mL 10 units = 0.5 mg	3.333 mg/mL 10 units = 0.333 mg	2 mg/mL 10 units = 0.2 mg

10 units on a U-100 syringe is 0.1 mL. Every cell is exact arithmetic: amount ÷ water.

what the numbers mean · where they come from

terms and sources

Label amount or measured amount. The calculator starts from the amount printed on the vial. A lot certificate’s measured content (net peptide content, in mg) can replace it for the vial that was tested. HPLC purity is a share of peak area, not a mass, so a purity-only correction is shown as an estimate. See HPLC, certificate of analysis and how to read a peptide COA.
Concentration. Amount in the vial ÷ water added. Terms: reconstitution, bacteriostatic water, lyophilized.
Syringe units. A volume: 0.01 mL per unit on a U-100 syringe, 0.025 mL on U-40. Units say nothing about the compound until the concentration is known.
Cost per draw. Vial price × amount per draw ÷ vial amount, from the price per mg of a current offer. Offers come from the PE-22-28 price comparison; certificates from the COA library.

Arithmetic only, on the numbers entered. Amounts from labels or trials are cited references, not recommendations; PeptideTech does not give personal use instructions and does not test products.

short answers

PE-22-28 calculator questions

How much bacteriostatic water do I add to PE-22-28 10mg?

Any volume the vial holds; 2 mL gives 5 mg/mL, so 10 units on a U-100 syringe holds 500 mcg. More water makes each draw read more units. The table below shows 1–5 mL for every PE-22-28 vial size on sale.

What changes the calculated concentration?

Only two inputs: the amount of PE-22-28 in the vial and the water added. 10mg in 2 mL is 5 mg/mL; twice the water halves it, and the amount per draw then reads twice the units. A lot certificate’s measured content, where printed, replaces the label amount. HPLC purity is a share of peak area, not a measured mass, so it is shown only as an estimate.

What doses of PE-22-28 were used in research?

No human studies; evidence is mouse depression models (Djillani et al. 2017). PeptideTech does not list unsourced doses.

What does PE-22-28 cost per mg?

The lowest current US price is $50.00 for 10mg at Amino USA (about $5.00 per mg, checked 2026-11-06). The calculator turns any vial price into cost per draw.

more calculators

Volume and concentration arithmetic for laboratory reconstitution; not medical advice. API: /api/calc. Syringe scales: 0.3 mL U-100, 0.5 mL U-100, 1 mL U-100, 0.5 mL U-40, 1 mL U-40, 1 mL syringe, 3 mL syringe.