GLPHubglpresearchhub.com
Read-only archive. GLP Research Hub is a static community record — nothing here is for sale, no account is needed, and no vote you cast is counted. Why?
Single comment threadYou are looking at one branch of [PSA] let the alcohol swab dry before you puncture, that is the step everyone skips — 36 comments in the full submission. View in context.
815
c/reconstitution·submitted 16 days ago by u/aurel_boateng

[PSA] let the alcohol swab dry before you puncture, that is the step everyone skips

PSAbranch of 6 comments

let the alcohol swab dry before you puncture, that is the step everyone skips, and I say this having got it wrong myself for long enough to be annoyed about it. The arithmetic in full: concentration is mass over volume, so 5mg into 1mL gives 5mg/mL. A U-100 syringe is graduated at 100 units per millilitre, so 0.75mg…

Read the full submission and all 36 comments →

This branch

6 comments, started 15 days ago
u/sleep_apnea_sam101 points·15 days ago

Adding more water does not change how much peptide is in the vial. It changes the concentration, which changes the volume you draw for the same amount. That is the entire relationship.

replysharereportpermalink
u/units_not_mgMOD59 points·15 days ago

Working has to be shown on arithmetic posts. Added a note asking for it rather than removing this one.

replysharereportpermalink
load more comments (4) →

← back to the whole thread

About c/reconstitution

The arithmetic and the technique. Bacteriostatic versus sterile water, reconstitution volume as a concentration choice, converting mg/mL into insulin-syringe units, dead space, swirl-not-shake, stopper coring, and how long a reconstituted vial is actually good for. Math errors get corrected fast and politely.

88kmembers
130submissions
Aug 2023created
submissions / month, last year
Sponsored

Sigma-Aldrich Standards

Certified reference materials for peptide identity and purity work.

sigmaaldrich.com
More in c/reconstitution
c/reconstitution rules
  1. Show your numbers. "How many units?" with no mg and no mL cannot be answered.
  2. Never post a calculation as advice without stating the concentration it assumes.
  3. No sterile-compounding-for-others discussion. Personal handling only.
  4. Independent community. Nobody here sells anything, and anyone who tries is banned.
  5. Not medical advice. Describe what you did; never prescribe to a stranger.
  6. Claims need evidence. Batch numbers, dated screenshots, independent test reports, or a citation.
  7. No referral links, discount codes or affiliate URLs. Permanent ban, no appeal.
  8. No contact handles, wallet addresses or tracking numbers — they identify people.
  9. Be recognisably decent. Disagree hard, insult nobody.
Full rules and how they are enforced →
Moderators
u/bac_water_banditu/vial_math_verau/units_not_mgu/swirl_dont_shake
Volunteers. Unpaid, unaffiliated, and reachable through modmail only.
Before you read on

Several compounds discussed on GLP Research Hub are sold for research use only and are not approved for human use anywhere. Nothing here is medical advice and none of it is written by your clinician. If a post reads like an instruction, treat it as a description of what one stranger did.

Full disclaimer →