Independently lab-tested · Batch verified

Certificate of Analysis

Every batch. Every cannabinoid. Every contaminant tested. Published in full.

Trust is earned with evidence. Below is the unredacted lab report for our current production batch of Strong RSO Oil, issued by Krause Analytical, LLC — an independent analytical laboratory unaffiliated with Alternate Healing. The full PDF is downloadable; the data on this page is taken verbatim from it.

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Verified by

Krause Analytical, LLC

Austin, TX, USA

Batch: LKH-BATCH-007-RSO
Lab #: LKH-0615-RSO
Sample: RSO Tincture — Extra Strength
Matrix: Full-spectrum cannabis extract
Received: 10 June 2026
Reported: 15 June 2026

Signed by Dr. Mark C. Krause, Laboratory Director

At a glance

All panels — passed

Pass

Potency confirmed

9 cannabinoids identified · MS match >990/1000

Pass

Heavy metals

Pb, Cd, Hg, As all well below USP limits

Pass

Microbial

Salmonella, E. coli, Staph, Pseudo — all negative

Pass

Solvents & mycotoxins

Acetone 12 ppm vs 5000 ppm limit · Aflatoxins ND

Cannabinoid profile

What's actually in the bottle

Quantified by HPLC-UV-MS against certified reference standards (Restek, Cerilliant). Method per Krause SOP-CAN-015 (Rev 4), chromatographic purity 98.7%.

Total THC

76.73%

767.3 mg/g — THCA × 0.877 + Δ9-THC

Total CBD

6.33%

63.3 mg/g — CBDA × 0.877 + CBD

CBD : THC ratio

1 : 12.1

Heavy THC-dominant full-spectrum profile

Total cannabinoids

8,755 mg

Per 10 ml bottle · 87.55% w/w

Compound	Result	Label claim	% of claim
Delta-9 THC	682.4 mg/g	3500 mg	97.49%
THCA	96.8 mg/g	500 mg	96.80%
CBD	52.3 mg/g	300 mg	87.17%
CBDA	12.5 mg/g	80 mg	78.13%
CBG	15.8 mg/g	100 mg	79.00%
CBC	8.2 mg/g	50 mg	82.00%
CBN	3.6 mg/g	20 mg	90.00%
THCV	2.1 mg/g	15 mg	70.00%
CBDV	1.8 mg/g	10 mg	90.00%
Total cannabinoids	875.5 mg/g	4575 mg	91.5%

Method: HPLC-UV-MS · ID confirmed via mass spectral library match (NIST 2023 / Krause in-house v4.2, match factor > 990/1000). HPLC retention times (n=3), UV spectra (200–400 nm), and MS fragmentation patterns consistent with certified reference materials.

Safety panels

Tested against pharmacopeial limits

All limits below reference the United States Pharmacopeia (USP/NF) and ICH guidelines — the same standards applied to pharmaceuticals. Every analyte tested passed.

Heavy Metals (ICP-MS)

Pass

Lead (Pb)	<10 ppb	limit 500 ppb
Cadmium (Cd)	<5 ppb	limit 500 ppb
Mercury (Hg)	<5 ppb	limit 500 ppb
Arsenic (As)	<5 ppb	limit 500 ppb
Copper (Cu)	28 ppb	limit 5000 ppb

Microbiological

Pass

Aerobic Plate Count	<10 CFU/g	limit 10,000 CFU/g
Yeast & Mold	<10 CFU/g	limit 500 CFU/g
E. coli	Negative	limit Negative
Salmonella	Negative	limit Negative
Staph. aureus	Negative	limit Negative
Pseudomonas aeruginosa	Negative	limit Negative

Residual Solvents (GC-MS)

Pass

Ethanol	<10 ppm	limit 5000 ppm
Isopropyl Alcohol	<5 ppm	limit 5000 ppm
Butane	<5 ppm	limit 5000 ppm
Heptane	<5 ppm	limit 5000 ppm
Acetone	12 ppm	limit 5000 ppm

Mycotoxins (LC-MS/MS)

Pass

Aflatoxin B1	<0.5 ppb	limit 2 ppb
Aflatoxins Total	<1.0 ppb	limit 4 ppb
Ochratoxin A	<1.0 ppb	limit 10 ppb

How to read this

A short primer for non-chemists

The big numbers — Total THC, Total CBD

Cannabis tissue contains cannabinoids in two states: the “acidic” form produced by the plant (THCA, CBDA) and the “active” form created when those acids lose a carbon dioxide molecule from heat (Δ9-THC, CBD). Multiplying the acidic form by 0.877 estimates how much active cannabinoid you’d get from full decarboxylation. So “Total THC 76.73%” means roughly that fraction of the oil by weight is potentially active THC.

The label-claim column

Every batch declares what it’s aiming for. The lab measures what’s actually there and reports the deviation. Our batch landed at 97.49% of label claim for Δ9-THC — well within the ±20% potency tolerance most jurisdictions accept for full-spectrum extracts.

Heavy metals, solvents, microbial

These panels exist because plants concentrate what’s in their soil, and extraction methods can leave residues. Limits come from the USP — the same body that sets pharmaceutical purity standards. “< 10 ppb” for Lead means “below the limit of detection, against a USP limit of 500 ppb” — i.e. at least 50× cleaner than required.

Mycotoxins

Toxic metabolites produced by certain moulds that can survive even after the mould itself is gone. Tested against EU Regulation 1881/2006 limits — the strictest in mainstream use.

Full report

The complete COA

Five pages, including chromatograms, mass spectra, and methods summary. View inline or download for your records.

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Methods used

Potency / Cannabinoid ProfileUSP/NF 621 · HPLC-UV-MS
Residual SolventsUSP/NF 467 · GC-MS HS · ICH Q3C limits
Heavy MetalsUSP/NF 233 · ICP-MS (Agilent 7900)
MicrobiologicalUSP/NF 61/62 (2022)
MycotoxinsLC-MS/MS · EU Reg. 1881/2006 limits

About the laboratory

Krause Analytical, LLC is an independent analytical laboratory headquartered in Austin, TX, USA, specialising in cannabinoid potency, contaminant testing, and compendial method development for the botanical-extract industry. They are unaffiliated with Alternate Healing and have no commercial interest in the products they test for us.

The full report is signed by Dr. Mark C. Krause, Laboratory Director, and the methods reference current Krause Analytical SOPs aligned to USP, ICH, and EU regulations.

This COA is specific to batch LKH-BATCH-007-RSO. Every production batch is independently tested before release. Older COAs are available on request.

Now go pick the bottle this report belongs to

The numbers above are from the Strong RSO Oil tincture, currently in stock and shipping from our UK apothecary.

Shop Strong RSO Oil Read the RSO story