Is tris(1 3-dichloro-2-propyl) phosphate safe in indoor air?

Under the app's default Cautious lens, tris(1 3-dichloro-2-propyl) phosphate in indoor air rates Swap: the app would put this near the top of your swap plan. 4 sourced concerns count (suspected carcinogen, consensus tier; suspected carcinogen, consensus tier; endocrine, emerging tier). This is research with sources, not medical advice.

What do the Clean, Low, Watch and Swap levels mean?

They are cut from a continuous concern level the app computes from the sourced claims that the chosen evidence lens shows: each claim counts its concern class, tier weight, confidence and dose relevance, combined worst-first with a decay so one serious finding outweighs many small ones, then scaled by how much of the substance reaches you in this use. Clean is below 0.35, Low below 1.1, Watch below 2.0 and Swap above that, on a 0 to 3 scale.

Is Tris(1 3-Dichloro-2-Propyl) Phosphate safe when eaten by a child?

Materials & packaging2 uses researched7 sourced claims

Where it turns up: foam furniture, textiles, plastics. Detox My Life researched tris(1 3-dichloro-2-propyl) phosphate under 2 different uses, because the same substance means something different in each. Every claim below carries its evidence tier, how sure the research is that it applies here, and the sources it cites. The level is computed by the app's own deterministic engine, so the page says exactly what the app would.

Level by use and lens

Use	Mainstream	Cautious (default)	Based	Concerns · favour · fringe
Eaten by a child	Swap	Swap	Swap	3 · 0
In indoor air	Watch	Swap	Swap	4 · 0

Mainstream shows consensus claims only; Cautious adds emerging research; Based adds fringe claims, labelled as such. The last column counts, under Cautious, the sourced concerns, the findings in its favour and the fringe claims Based would add.

Safer swaps: the app's swap catalog covers the products this turns up in: Stain-resistant treated fabric. Alternatives are always types, never brands.

Eaten by a child Swap

Under the default Cautious lens tris(1 3-dichloro-2-propyl) phosphate when eaten by a child rates Swap: the app would put this near the top of your swap plan. Mainstream (consensus only) rates it Swap; Based (adds the fringe) rates it Swap. Researched 2026-09-03.

Sourced concerns (3)

ConsensusSuspected carcinogenconfidence 90%

Tris(1,3-dichloro-2-propyl) phosphate (TDCPP) is classified as a known carcinogen by California Proposition 65, based on animal studies showing increased tumor formation in the liver and brain following chronic oral exposure.

Why here: TDCPP is an additive flame retardant used in many children's products and furniture foam, from which it can migrate into house dust. Children are highly exposed through hand-to-mouth behavior and ingestion of contaminated dust.
What would have to be true: Ingestion of house dust contaminated with TDCPP, with estimated daily intake for some infants exceeding the U.S. Consumer Product Safety Commission's acceptable daily intake of 5 µg/kg/day for non-cancer risks.
The other side: The U.S. Environmental Protection Agency (EPA), International Agency for Research on Cancer (IARC), or National Toxicology Program (NTP) have not yet classified TDCPP's carcinogenicity.

Sources the engine cites:

Tris (1,3-dichloropropyl-2) Phosphate - Toxicological Risks of Selected Flame-Retardant Chemicals — nih.gov (2000) · regulator or public body
Exposure to TDCPP Appears Widespread - PMC - NIH — nih.gov (2013) · regulator or public body
1 community or commercial page, not counted here.

EmergingEndocrineconfidence 80%

Studies suggest that TDCPP can act as an endocrine disruptor, with animal and in vitro studies linking exposure to changes in circulating hormone levels, altered thyroid hormone levels (decreased T4, increased T3), and altered gene expression related to thyroid function.

Why here: Children are exposed to TDCPP through ingestion of contaminated house dust from products containing the flame retardant.
What would have to be true: Exposure to TDCPP from consumer products and house dust, with human biomonitoring studies confirming its presence in human breast milk and urine.
The other side: While mounting evidence suggests endocrine-disrupting effects, more research, particularly human epidemiological studies, is needed to fully understand the extent and mechanisms of these effects in humans.

Sources the engine cites:

Exposure to TDCPP Appears Widespread - PMC - NIH — nih.gov (2013) · regulator or public body

EmergingMetabolicconfidence 70%

Prenatal exposure to TDCPP has been positively associated with infant growth trajectories, with female infants showing increased growth in length and weight, particularly at 9 months.

Why here: TDCPP can cross the placental barrier, leading to prenatal exposure, and is also present in breast milk, contributing to early life exposure through ingestion.
What would have to be true: Prenatal exposure through maternal transfer and postnatal exposure through breast milk and ingestion of contaminated dust.
The other side: This is a recent finding from a single study involving mother-child pairs, and further research is needed to confirm these associations and elucidate the underlying mechanisms.

Sources the engine cites:

Organophosphorus Flame Retardant TDCPP Displays Genotoxic and Carcinogenic Risks in Human Liver Cells - MDPI — mdpi.com (2022) · study
1 web article (eurekalert.org), linked in the app.

In indoor air Swap

Under the default Cautious lens tris(1 3-dichloro-2-propyl) phosphate in indoor air rates Swap: the app would put this near the top of your swap plan. Mainstream (consensus only) rates it Watch; Based (adds the fringe) rates it Swap. Researched 2026-09-03.

Sourced concerns (4)

ConsensusSuspected carcinogenconfidence 50%

Tris(1,3-dichloro-2-propyl) phosphate (TDCPP) is classified as a chemical known to cause cancer by California's Proposition 65.

Why here: TDCPP is an additive flame retardant used in products like furniture and baby items, allowing it to migrate into indoor dust and air, leading to human exposure through inhalation and incidental ingestion of dust.
What would have to be true: Exposure occurs through inhalation of indoor air and dust, and incidental ingestion of dust, particularly for children who spend more time near the floor and engage in hand-to-mouth behavior.

Sources the engine cites:

Exposure to TDCPP Appears Widespread - PMC - NIH (2013) · regulator or public body
1 web article (Wikipedia), linked in the app.

ConsensusSuspected carcinogenconfidence 50%

Tris(1,3-dichloro-2-propyl) phosphate (TDCPP) is regarded as a suspected carcinogen by the European Chemicals Agency (ECHA) and classified as a "suspected human carcinogen" by Canada.

Why here: As an additive flame retardant in consumer products such as polyurethane foams in furniture and mattresses, TDCPP can be released into indoor environments and contribute to human exposure via inhalation and dermal contact with dust.
What would have to be true: Exposure to the general population occurs through inhalation of indoor air and dust, and prolonged skin contact with manufactured items containing TDCPP.

Sources the engine cites (no regulator, review or study among them):

1 web article (Wikipedia), linked in the app.

EmergingEndocrineconfidence 50%

Studies have linked tris(1,3-dichloro-2-propyl) phosphate (TDCPP) exposure in indoor environments to potential endocrine disruption, with associations found between high concentrations of TDCPP in house dust and decreased T4 levels and altered reproductive parameters in men.

Why here: TDCPP is an additive flame retardant that migrates from treated products into indoor dust and air, leading to chronic low-level exposure through inhalation and incidental ingestion of dust.
What would have to be true: Human exposure occurs through inhalation of indoor air and dust, and incidental ingestion of dust, particularly in homes and offices where products containing TDCPP are present.

Sources the engine cites:

Exposures, Mechanisms, and Impacts of Endocrine-Active Flame Retardants - PMC — PMC - NIH (2014) · regulator or public body
1 web article (Wikipedia), linked in the app.

EmergingTheoryconfidence 50%

Tris(1,3-dichloro-2-propyl) phosphate (TDCPP) is suggested by studies to be neurotoxic and neurodevelopmentally toxic to humans and animals, potentially acting through mechanisms like oxidative stress and neuroinflammation.

Why here: As an additive flame retardant, TDCPP is released from consumer products into indoor air and dust, leading to chronic exposure through inhalation and incidental ingestion.
What would have to be true: Exposure occurs through inhalation of indoor air and dust, and incidental ingestion of dust, particularly for vulnerable populations like children.

Sources the engine cites:

Exposure to TDCPP Appears Widespread - PMC - NIH (2013) · regulator or public body
The neurotoxicity of organophosphorus flame retardant tris (1,3-dichloro-2-propyl) phosphate (TDCPP): Main effects and its underlying mechanisms - PubMed (2024) · regulator or public body

Not researched here

The engine has no dossier for tris(1 3-dichloro-2-propyl) phosphate when cooked with heat, in cold food, as a finishing ingredient, in heated food packaging or other uses. The app researches an ingredient for the use it infers from your product, so a scan fills these in; this page only shows what has already been researched and source-verified.

This is research, not medical advice. Detox My Life shows sourced claims sorted by evidence tier. It does not diagnose, treat, or tell you to start or stop anything. Talk to a qualified professional about your health.

Scan your own. The app reads any product label with your camera, works out how you are about to use it, and researches every ingredient for that use with live sources. Every scan adds to a Detox Score for your home, where 50 is a typical home in your region, and a plan of next swaps.

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