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Disodium Diaminostilbene Disulfonate

  • Dyes & colorants
  • CAS 4404-43-7
  • IUPAC: disodium 4,4'-bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonate

Disodium Diaminostilbene Disulfonate (CAS 4404-43-7) appears in 1 of the 1,812 car-care products CarCareTruth tracks (as of June 2026).

Disodium diaminostilbene disulfonate is an optical brightener (fluorescent whitening agent, FWA). No GHS hazard classification at typical use concentrations. Not on California's Prop 65 list. Limited environmental biodegradability data; optical brighteners are generally considered environmentally persistent at low concentrations. Not classified as aquatic-toxic at typical cleaning product concentrations, but some FWA compounds have shown effects at higher concentrations in aquatic systems.

Disodium diaminostilbene disulfonate is a stilbene-based fluorescent whitening agent (FWA) used in fabric cleaners, carpet shampoos, and interior cleaners to enhance visual brightness of treated surfaces. It absorbs ultraviolet radiation and re-emits it as visible blue-white light, counteracting yellowing in white and light-colored fabrics. Common in laundry detergents and upholstery cleaners.

Regulatory status

  • Not CA Prop 65 listed
  • EU CLP: no hazard classification at typical use concentrations
  • Poorly biodegradable; some FWA compounds classified as aquatic pollutants at higher concentrations in EU REACH assessments

Health & environment profile

VOC
no
Prop 65 listed
no
Asthmagen
no
EPA Safer Choice
no
Aquatic toxicity
no
Biodegradable
no
Bioaccumulative
no
Persistent
yes
Ozone depleting
no
Microplastic
no
PFAS
no
Env. score
4/5
Purpose: Optical brightener; absorbs UV light and re-emits as visible blue-white light; used in fabric and carpet cleaners to enhance brightness perception

Common questions about Disodium Diaminostilbene Disulfonate

What is Disodium Diaminostilbene Disulfonate used for in car care?
Optical brightener; absorbs UV light and re-emits as visible blue-white light; used in fabric and carpet cleaners to enhance brightness perception
Is Disodium Diaminostilbene Disulfonate a VOC?
No. Disodium Diaminostilbene Disulfonate is not classified as a volatile organic compound (VOC).
Is Disodium Diaminostilbene Disulfonate on California's Proposition 65 list?
No. Disodium Diaminostilbene Disulfonate is not on California's Proposition 65 list.

1 product contain this

Related

Health and environment notes translate the manufacturer Safety Data Sheet, the GHS classification, and authoritative regulatory listings (California Prop 65, EPA). Not medical advice. They describe the ingredient itself; whether a hazard applies to a finished product depends on its concentration and how it's used.