Home Safety / Compounds / NTA

NTA in your home: a safety profile

Moderate risk for your home

(Your Household-specific data is limited; this page draws from human adult context.) Safety profile for NTA relevant to your household.

What is nta?

The IUPAC name is nitrilotriacetic acid.

Also known as: nitrilotriacetic acid, N,N-bis(carboxymethyl)aminoacetic acid, N,N,N-tricarboxymethylamine, Ethyltriethoxysilane.

IUPAC name
nitrilotriacetic acid
CAS number
139-13-9
Molecular formula
C6H9NO6
Molecular weight
191.14 g/mol
SMILES
CCO[Si](CC)(OCC)OCC
PubChem CID
6515

Risk for your household

Moderate risk

Regulatory consensus

3 regulatory and scientific bodies have classified NTA. The classifications differ — that's the data.

AgencyYearClassificationNotes
EU_CLP—Acute Tox. 4 (Oral)H302: Harmful if swallowed
IARC——Group 2B - Possibly carcinogenic to humans (1991)
EPA——Restricted in some applications; environmental concerns for persistence

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where your home encounter nta

  • detergents
  • metal cleaning
  • industrial chelation
  • water treatment

Safer alternatives

Lower-risk approaches that achieve a similar outcome to NTA:

  • GLDA (tetrasodium glutamate diacetate) — readily biodegradable chelator
    Trade-offs: Extremely mild (pH 5.5-6.5); biodegradable; derived from amino acids and fatty acids; premium ingredient cost; excellent consumer perception; lower foam volume than sulfate surfactants.
    Relative cost: 1.2-2×
  • Citric acid — food-grade, naturally occurring
    Trade-offs: Alternative chelating agent; stability constants for target metal ions differ; biodegradability varies (EDTA poorly biodegradable, citrate fully biodegradable); downstream water treatment impact should be assessed.
    Relative cost: 2-5× conventional
  • MGDA (methylglycinediacetic acid) — high biodegradability
    Trade-offs: Alternative chelating agent; stability constants for target metal ions differ; biodegradability varies (EDTA poorly biodegradable, citrate fully biodegradable); downstream water treatment impact should be assessed.
    Relative cost: 1.2-2×

Frequently asked questions

What products contain nta?

NTA appears in: detergents; metal cleaning; industrial chelation.

Why do regulators disagree about nta?

NTA has been classified by 3 agencies including EU_CLP, IARC, EPA, with differing conclusions. Regulators apply different standards of evidence (animal data weighting, exposure-pattern assumptions, epidemiological power thresholds), which is why two scientific bodies can review the same data and reach different conclusions. See the regulatory consensus table on this page for the full picture.

See NTA in the home app

Look up products containing nta, compare to alternatives, and explore the full data record.

Open in home View raw API data

Sources (2)
  1. PubChem Compound CID 6515 — database
  2. ATSDR Toxicological Profile — CAS 139-13-9 — reference

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →