Lot B8186 is one of 8 lots of TB-500 we have release-tested for this catalog, scored on purity, quantity, and batch traceability. Independent third-party HPLC/MS verification of this lot is available on request.
9.5/10
A+ Excellent
Purity
3.5 / 4
Quantity
4.0 / 4
Identifier
2.0 / 2
The test score is calculated from purity (how much of the vial content is the expected compound, with values closest to 100% best and below 98% considered unacceptable), quantity (how close the measured amount is to the label claim, more than plus or minus 20% is unacceptable), and identifier (whether the batch this vial came from can be traced to a certificate).
Sample details
ProductTB-500 5mg
Sample typeSealed retail vial
Date received21 Feb 2026
Physical detailsPrinted label / aluminum crimp / teal cap
Test details
MethodRP-HPLC-UV + LC-MS
Tested on23 Feb 2026
Tested byRTT Peptides QC
ReportQC-21527
Score breakdown
Purity
99.25%
3.5 / 4
Measured purity by RP-HPLC-UV against the ≥ 98.0% release specification. Net peptide content 92.5%.
Quantity
5.1mg
4.0 / 4
Label claim 5mg, measured 5.1mg, divergence +2.0%. Within plus or minus 5% of label scores full marks.
Identifier
B8186
2.0 / 2
Batch identifier printed on the vial and traceable to this certificate, so the lot can be verified end to end.
Sample logistics
15 Feb 2026
Sample logged for release testing
21 Feb 2026
Received and processed at the QC facility
23 Feb 2026
Assayed by RP-HPLC-UV with LC-MS confirmation
24 Feb 2026
Certificate of analysis issued and released
Certificate authentication
Test certificate ID1s2zdr4
ProductTB-500 5mg from RTT Peptides
Batch IDB8186
Tested byRTT Peptides QC on 23 Feb 2026
Verification URL
https://rttpeptides.com/verify/coa/tb-500-B8186/
Detailed certificate of analysis
RTT PEPTIDES · QUALITY ASSURANCE
Analytical release certificate · RP-HPLC-UV with LC-MS confirmation Independent third-party verification available on request.
ReportQC-21527Issued2026-02-24Page1 of 1
Certificate of AnalysisTB-500 · Lot B8186
SampleTB-500
Issued forRTT Peptides
Lot / BatchB8186
Label claim5mg
CAS77591-33-4
AppearanceWhite lyophilized powder
Date received2026-02-21
Date analyzed2026-02-23
01 Purity by RP-HPLC-UV
Figure 1 · Reverse-phase HPLC-UV chromatogram at 214 nm. C18, 2.7 µm; gradient 0.1% TFA in water / acetonitrile at 1.0 mL/min.
Purity by RP-HPLC-UV: component retention time, peak area, and area percent
#
Component
RT (min)
Area (mAU·s)
Area %
1
RRT 0.65
5.30
14.7
0.35
2
RRT 0.87
7.06
16.8
0.40
3
TB-500 ▸ main
8.12
4168.5
99.25
✓
Purity (HPLC) 99.25% · net peptide content 92.5% · meets the ≥ 98.0% release specification.
02 Identity by LC-MS
Expected average mass4963.44 Da
Observed mass4963.66 Da
✓
Identity confirmed · observed mass conforms to the expected structure of TB-500.
03 Summary of results
Summary of results: test, method, specification, result, and outcome
Test
Method
Specification
Result
Outcome
Purity
RP-HPLC-UV, 214 nm
≥ 98.0 %
99.25 %
✓ Pass
Identity
LC-MS (ESI+)
Consistent with structure
Confirmed
✓ Pass
Net peptide content
By difference
Report
92.5 %
n/a
Appearance
Visual
White lyophilized powder
Conforms
✓ Pass
Reconstitution
Bacteriostatic water
Clear, particulate-free
Conforms
✓ Pass
The submitted lot conforms to identity and meets the stated purity specification. Analysis was performed by RP-HPLC-UV with LC-MS confirmation. Results relate only to the lot as received and tested and do not constitute a certificate of any third party.
Quality Assurance · RTT Peptides
Issued under the RTT Peptides quality program; this is the vendor's own release certificate. Independent third-party HPLC/MS verification of any lot is available on request. Products are supplied strictly as research reagents for in-vitro laboratory use only, not for human or animal consumption. Report QC-21527 · RP.
This is the vendor's own release certificate. Independent third-party HPLC/MS verification of this lot is available on request.
Research use only
RTT Peptides sells laboratory research reagents. They are not for human or animal consumption. Please confirm the statements below to place your order.
