Find a word.
Make sense of the label.

A reporting limit is the smallest amount the lab reports reliably. A result below it does not prove no solvent was used.

A useful question: “Is this a process claim or a lab finding?”

The standard symbol is μm. In hash making, screens and filter bags are sized in microns, so “90u” usually names the screen the resin was collected on. A screen size is not a quality grade or a test result. Ask what the number refers to; do not assume it measures the finished product.

A useful question: “What was measured or filtered at 90 microns?”

In Washington, licensed processors may use the hydrocarbons n-butane, isobutane, propane or heptane in a certified closed-loop system, and finished extracts must stay within residual solvent limits. The solvent describes the method. It is not a verdict on the quality or safety of a particular batch.

A useful question: “Which solvent was used, and can I see the residual solvent results?”

BHO means butane hash oil. The chemical guide covers butane and workplace hazards; it does not measure what remains in a finished cannabis product.

A useful question: “Can I see this batch’s residual solvent results?”

CO2 extraction is solvent-based even though it uses a different substance from butane.

A useful question: “What does the process label tell me?”

Match the batch, lab, date and tests to the product. A report only covers what was tested; ask the retailer to show it.

A useful question: “Does this report match this batch?”

Different concentrates have different production methods and THC levels.

A useful question: “How was this made?”

Filtering can lighten an extract, so color alone is not proof of starting quality or purity. Washington’s extraction rule does not name color remediation or filter media, and we did not find regulator guidance or independent studies on it. Treat claims either way with care.

A useful question: “Was this extract filtered for color, and what was in the filter?”

Menus usually list it as its own concentrate category. Refining changes the original plant profile, so read the ingredient list for anything added back, such as terpenes or flavors. A small California study of vape cartridges found terpenes, other plant extracts and some additives alongside the cannabinoids.

A useful question: “What was added after refining, and is it listed on the label?”

It includes molecules made by the body, receptors that receive signals, and enzymes that help make or break down those molecules. A body-system explanation alone does not prove a treatment works.

A useful question: “Is this describing a body process or a tested health benefit?”

How a product is used affects when effects begin and how long they last.

A useful question: “Where is the serving information?”

Extraction using ethanol belongs in the solvent-based category.

A useful question: “Was ethanol used in processing?”

The name tells you the form, not its THC content.

A useful question: “What does this batch’s label show?”

Washington’s extraction rule lists heat, screens, presses, steam distillation and ice water as methods that use no solvents or gases, and names kief, hashish and bubble hash. “Full melt” is a seller’s grading term that the rule does not define; ask what it means for this batch. A method describes separation, not contaminant results.

A useful question: “How was this separated, and what does the batch report show?”

This source describes n-heptane and its workplace hazards. Similar names do not mean the same properties or test results.

A useful question: “Am I reading about heptane or hexane?”

NIOSH identifies nerve damage as a risk of n-hexane exposure. That workplace information is separate from a finished-product test.

A useful question: “Does the source identify the exact chemical?”

A 2021 study found these labels did not neatly separate samples by overall genetics or chemistry. It did not test how people felt after using the samples.

A useful question: “What does the batch report add to this menu description?”

In Washington, indoor production takes place in a fully enclosed facility or a greenhouse with rigid walls, while outdoor production can include nonrigid greenhouses and open ground inside a fence. A small 2023 study of genetically identical plants found indoor and outdoor chemical profiles differed. The setting alone does not tell you a product’s quality, strength or effect.

A useful question: “Where was this grown, and what do the batch results show?”

The added concentrate can increase THC content.

A useful question: “What was added?”

It has a different molecular structure from n-butane. Use the exact chemical name when comparing a safety sheet or lab result.

A useful question: “Does the report list isobutane, n-butane, or both?”

“Live” describes the starting material, not a promised flavor or effect. Lighter aroma compounds can be lost during drying, which is the reason producers start from frozen plants. Washington’s extraction rule does not define the term, so ask what “live” means for this product.

A useful question: “Was this made from fresh frozen material, and with which solvent?”

As with live resin, “live” describes the starting material. Unlike live resin, the separation uses ice water, screens and pressure rather than a solvent. Washington’s extraction rule does not define the term, and it is not a guarantee of flavor, strength or safety.

A useful question: “Was this pressed from fresh frozen hash, and can I see the batch report?”

A product logo, a store’s medical endorsement and a person’s professional certificate are different. A logo does not guarantee a particular result for you.

A useful question: “Which product standard does this logo identify?”

Check whether concentrate has also been added.

A useful question: “Is this plain or infused?”

Seeing a solvent name does not tell you how much remains after processing. Use the product’s own lab report to check that.

A useful question: “Which solvents did the lab test for?”

An action limit is the level that triggers a regulatory response. A passing result can be below that limit without being zero.

A useful question: “Which solvent results are listed?”

Rosin is an example of mechanical extraction. Read the full process name when comparing products.

A useful question: “Is this rosin made by pressing?”

Butane, ethanol and carbon dioxide are examples. Knowing the process is a starting point; the batch report answers a different question.

A useful question: “Which solvent was used?”

Washington’s extraction rule lists the methods that use no solvents or gases: heat, screens, presses, steam distillation and ice water. Kief, hash and rosin are familiar examples. The word describes how material is separated, not a medical benefit or a guarantee of no contaminants.

A useful question: “How was it separated?”

The cited definition comes from wine growing. In cannabis, ask for a specific growing practice or observation instead of treating the word as a promised flavor or effect.

A useful question: “What about this place or growing practice is being described?”

Check its ingredients and instructions.

A useful question: “How is this meant to be used?”