First Source
Home Services · August 8, 2026
E P A · draft risk evaluations under the Toxic Substances Control Act · o-dichlorobenzene and p-dichlorobenzene · publishes August 10, 2026 · dockets EPA-HQ-OPPT-2018-0444 and -0446 · comments due October 9, 2026

E P A has preliminarily decided that both dichlorobenzenes present an unreasonable risk to human health. One of them is sold as a continuous-action air freshener — the product category that hangs and slowly dissolves in the buildings you service. You don’t need the chemistry. You need two numbers, and an hour with your S D S binder.

Every service company’s shop has the binder — or the folder on the server — of safety data sheets for what rides on the trucks. Most weeks nobody opens it. Monday the E P A gives you a reason to: draft risk evaluations for two workhorse chemicals, o-dichlorobenzene and p-dichlorobenzene, with a preliminary finding that both present unreasonable risk to human health under conditions of use the agency analyzed.

The p version is the one that touches this trade. E P A’s own notice lists its commercial uses: solvents, thermoplastic manufacture, and — the one to read twice — “use in air care products as continuous-action air fresheners.” On the consumer side: air care products, lubricants and greases, building and construction products. The exposure route the agency flags is the product working as designed: it evaporates, and people breathe it while it does.

95-50-1·106-46-7

The two C A S registry numbers — o-dichlorobenzene and p-dichlorobenzene. Search your safety data sheets for these, not the names.

Chemical names on an S D S shift with the supplier — the C A S number never does. An hour with the binder tells you whether this rulemaking is about your product line or somebody else’s.

Verbatim — the preliminary finding, from the notice
EPA used the best available science to prepare these draft risk evaluations and preliminarily determined, based on the weight of scientific evidence, that o-dichlorobenzene and p-dichlorobenzene present unreasonable risk to human health driven primarily by certain COUs analyzed in the draft risk evaluations.

Here is the part most coverage will skip: E P A published, in the same notice, a list of questions it wants answered. Worker activities. Air concentrations. How prevalent each use actually is. What protective equipment people actually wear. For o-dichlorobenzene it asks specifically about ink and toner products and about spot-cleaning in dry cleaning and furniture care. The people who hold those answers are not in Washington. They’re on the trucks. A service company that installs, stocks or removes these products has standing to say what real use looks like — and sixty days to say it.

A draft is a draft. It considers risk only — costs and alternatives come later, and findings move between draft and final. But the direction is visible: a final unreasonable-risk determination obligates E P A to write risk-management rules. Restrictions land on product categories after paperwork like this. Rarely before.

October 9

Three moves before the window closes. Run the binder search — grep your S D S sheets for 95-50-1 and 106-46-7; if neither appears, this edition cost you ten minutes and you’re done. If they appear, comment — docket EPA-HQ-OPPT-2018-0444 for the o, -0446 for the p, at regulations.gov; the agency is explicitly asking for field data only operators have. Brief your commercial customers — the facilities where continuous-action air care hangs deserve to hear “E P A is reviewing this category, here’s our read” from you in August, not from a headline later.

Kept honest. The notice does not name which conditions of use drive the unreasonable-risk finding — that detail lives in the draft evaluations themselves, which I have not read; read them before telling a customer any specific product is implicated. No brand or product is named anywhere in this piece because none is named in the notice — the C A S-number check against your own sheets is the only honest test of whether you’re affected. And a preliminary determination is not a ban, a phase-out, or a final finding — it is the step that starts the argument, which is exactly why the comment window matters.

Sources, primary, fetched today, August 8, 2026. (1) Environmental Protection Agency, o-Dichlorobenzene and p-Dichlorobenzene; Draft Risk Evaluations Under the Toxic Substances Control Act (TSCA); Notice of Availability and Request for Comment, F R Doc. 2026-16263, scheduled for publication August 10, 2026, comments due 60 days after publication (October 9, 2026 per the Federal Register API record) — read in full from the public-inspection PDF, federalregister.gov/d/2026-16263 — source of the preliminary unreasonable-risk determination quoted verbatim, both C A S registry numbers (95-50-1, 106-46-7), both docket numbers, the listed industrial, commercial and consumer uses including “continuous-action air fresheners,” the inhalation-during-use exposure mechanism, and the agency’s specific requests for worker-activity, concentration and prevalence data. The observation about where risk-management rules land is mine, from how T S C A sequencing works as described in the notice itself (risk evaluation first, “without consideration of costs or non-risk factors”).

Meschelle Peterson
code63labs

LinkedIn-ready text

EPA is about to publish draft risk evaluations for two chemicals most service companies have somewhere on a truck or a shelf — and its preliminary finding is that both present unreasonable risk to human health.

o-Dichlorobenzene and p-dichlorobenzene. If those names mean nothing, good — you don't need them. You need the CAS numbers: 95-50-1 and 106-46-7.

The p version is the one that touches buildings trades. EPA's own notice lists its uses: solvents, thermoplastics, and "use in air care products as continuous-action air fresheners" — plus consumer air care, lubricants and greases, and building and construction products. The exposure mechanism the agency flags is the product doing its job: it evaporates, and people breathe it while it does.

Here's what I'd actually do with this, in order:

1. Search your SDS binder for the two CAS numbers. Names on safety sheets change with the supplier; the number never does. If neither appears, you're done — ten minutes.

2. If they appear: EPA published, in the same notice, the exact questions it wants answered. How the products are actually used. Real air concentrations. What PPE people actually wear. That's field knowledge, and the people who have it are on trucks, not in Washington. Comments are open for 60 days — docket EPA-HQ-OPPT-2018-0444 for the o, -0446 for the p.

3. Brief your commercial customers now. If continuous-action air care hangs in facilities you service, "EPA is reviewing this category — here's our read" is a conversation worth owning in August, before it's a headline you're reacting to.

The honest frame: this is a draft. It weighs risk only — costs and alternatives come later — and findings can move before final. No specific product or brand is named. But the sequence is visible: a final unreasonable-risk finding legally obligates EPA to write risk-management rules. Category restrictions arrive after paperwork like this. Rarely before.

Comments close October 9. The binder search takes an hour. Cheap insurance.

Claude Design — motion animation prompt

Use the MRP Personal Design System (Signature). Create a 1080x1350 animated piece titled "Two Numbers, One Binder." Bone field (#F4F1EC), Ink type (#141414), Coral Deep (#D9401F) for kicker, labels and rules; Coral Bright (#FF6A4D) spent EXACTLY TWICE — once on "106-46-7" when the pair completes in beat 2, once on the final line of the end card. Cormorant for the big figures and end card; Manrope Light for captions and footer; Italiana for the SignatureMark. Tall, airy, left-aligned. Max 3 type moves. The piece is TWO REGISTRY NUMBERS TREATED LIKE HEADLINES. No molecules drawn, no hazard diamonds, no spray bottles. Typography only.

Sequence (about 38 seconds):
1. (0-5s) Kicker top-left, letter-spaced uppercase Manrope in Coral Deep, types on: "EPA · DRAFT RISK EVALUATIONS · TSCA · COMMENTS DUE OCT 9, 2026". Below, one Manrope Light Ink line fades up: "two chemicals. a preliminary finding. one binder to check." Hold.
2. (5-16s) Two very large Cormorant figures land one after the other, stacked left: "95-50-1" in Ink, then "106-46-7" which warms to Coral Bright (moment 1 of 2). Manrope Light caption beneath the pair: "CAS registry numbers — search your safety data sheets for these, not the names". HOLD, unvoiced, two seconds.
3. (16-25s) The numbers dim slightly and hold. One Manrope Light Ink sentence fades in below, set in quotation marks, attributed with a small Coral Deep rule: "…present unreasonable risk to human health…" and beneath it a caption: "EPA's preliminary determination, in its own words". Then a second caption line: "among the listed uses: continuous-action air fresheners".
4. (25-32s) Three short Manrope Light lines fade in, each with a small Coral Deep rule: "search the binder — one hour" / "comment if it's your product line — 60 days" / "brief your customers — before it's a headline".
5. (32-38s) Clear. End card in Cormorant, three lines, the third warming to Coral Bright (moment 2 of 2): "A draft is where the argument starts." / "October 9 is where it closes." / "Check the binder." Footer in Manrope Light Ink: "EPA DRAFT RISK EVALUATIONS · FR DOC 2026-16263 · DOCKETS EPA-HQ-OPPT-2018-0444 / -0446 · COMMENTS DUE OCT 9, 2026". SignatureMark bottom-left: Italiana "Meschelle Peterson" + code63labs.

Motion language: fades and settles only — the registry numbers should land with the gravity of headline figures, which is the piece's one joke and its whole argument. No bounce, no counters, no dissolving-molecule effects. The design rests on beat 2 making two catalog numbers feel like news.

FIRST SOURCE · one verified original-source finding, composed for one reader · this edition: home services — written for the companies whose trucks carry products they'll be asked about by name this fall