Baby Safety / Compounds / N-Nitrosomorpholine (NMOR)

Is N-Nitrosomorpholine (NMOR) safe for babies and kids?

Moderate risk for kids

Infants accumulate N-Nitrosomorpholine (NMOR) through breast milk (bioconcentration), placental transfer, and dust ingestion. Persistent pollutants concentrate in fatty tissues with extended half-lives in developing organisms.

What is n-nitrosomorpholine (nmor)?

The IUPAC name is 4-nitrosomorpholine.

Also known as: 4-nitrosomorpholine, N-NITROSOMORPHOLINE, Nitrosomorpholine, Morpholine, 4-nitroso-.

IUPAC name
4-nitrosomorpholine
CAS number
59-89-2
Molecular formula
C4H8N2O2
Molecular weight
116.12 g/mol
SMILES
C1COCCN1N=O
PubChem CID
6046

Risk for babies

Moderate risk

Infants accumulate N-Nitrosomorpholine (NMOR) through breast milk (bioconcentration), placental transfer, and dust ingestion. Persistent pollutants concentrate in fatty tissues with extended half-lives in developing organisms.

Neonates and infants up to 12 months have incomplete blood-brain barrier development, immature Phase I/II metabolic enzymes (particularly CYP3A4, UGT1A1), and higher gastrointestinal permeability. Equivalent doses produce higher internal concentrations and longer residence times.

What to do: Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Risk for pregnant and nursing people

Elevated risk

N-Nitrosomorpholine (NMOR) persists in maternal adipose tissue and is mobilized during pregnancy and lactation. Lipophilic pollutants concentrate in breast milk and cross the placenta during critical developmental windows.

Suspected reproductive toxicant (GHS H361) or suspected endocrine disruptor. Precautionary approach warranted. Animal studies or limited human data suggest developmental toxicity potential.

What to do: Minimize exposure during pregnancy and lactation. Consult healthcare provider regarding specific risks. Consider alternative products with lower hazard profiles.

Regulatory consensus

5 regulatory and scientific bodies have classified N-Nitrosomorpholine (NMOR). The classifications differ — that's the data.

AgencyYearClassificationNotes
EPA CTX / NTP RoC—Reasonably Anticipated to be a Human Carcinogen
EPA CTX / IARC—Group 2B - Possibly carcinogenic to humans
EPA CTX / CalEPA—Known human carcinogen
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 16 positive / 1 negative reports)
EPA CTX / Genetox—Genotoxicity: positive (Ames: positive, 16 positive / 1 negative reports)

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 kids encounter n-nitrosomorpholine (nmor)

  • Industrial Facilities — Manufacturing plants, Chemical storage areas, Waste treatment sites
  • Occupational Environments — Factories, Warehouses, Transportation vehicles

Safer alternatives

Lower-risk approaches that achieve a similar outcome to N-Nitrosomorpholine (NMOR):

  • Exposure reduction (environmental contaminant)
    Trade-offs: Removes 95-99% of dissolved contaminants including metals, PFAS, nitrates; wastes 2-4 gallons per gallon produced (improving with newer systems); removes beneficial minerals; $0.05-0.25/gallon; requires pre-treatment for longevity.
    Relative cost: 1.2-2×

Frequently asked questions

Is n-nitrosomorpholine (nmor) safe for kids?

Infants accumulate N-Nitrosomorpholine (NMOR) through breast milk (bioconcentration), placental transfer, and dust ingestion. Persistent pollutants concentrate in fatty tissues with extended half-lives in developing organisms.

What products contain n-nitrosomorpholine (nmor)?

N-Nitrosomorpholine (NMOR) appears in: Manufacturing plants (Industrial facilities); Chemical storage areas (Industrial facilities); Factories (Occupational environments); Warehouses (Occupational environments).

What should I do if my child is exposed to n-nitrosomorpholine (nmor)?

Minimize infant exposure through source control. For breastfeeding mothers: reduce maternal exposure. For formula-fed infants: use certified low-migration bottles and verified water sources. Consult pediatrician regarding any concerns.

Why do regulators disagree about n-nitrosomorpholine (nmor)?

N-Nitrosomorpholine (NMOR) has been classified by 5 agencies including EPA CTX / NTP RoC, EPA CTX / IARC, EPA CTX / CalEPA, EPA CTX / Genetox, EPA CTX / Genetox, 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 N-Nitrosomorpholine (NMOR) in the baby app

Look up products containing n-nitrosomorpholine (nmor), compare to alternatives, and explore the full data record.

Open in baby View raw API data

Sources (2)
  1. IARC Monographs Volume 17: Some N-Nitroso Compounds — NDMA Group 2A, NDEA Group 2A, NPYR Group 2B, NPIP Group 2B, NDBA Group 2B, NMEA Group 2B, NMBA Group 2B, N-Nitrosomorpholine Group 2B (1978, updated in Supplement 7, 1987) (1978) — regulatory
  2. EFSA Panel on Contaminants in the Food Chain (CONTAM): Scientific Opinion on the Risk for Human Health Related to the Presence of Nitrosamines in Food — Group MOE approach for 10 priority nitrosamines in processed meat, fish, and other food categories; benchmark MOE 10,000 (2023) (2023) — regulatory

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 →