Provenance

Reference data from EU CLP Annex VI and published regulations — verify against your supplier's SDS before use.

Build a label

Substance profile

Benzenesulfonic acid, 3,3'-(methylenebis((dihydroxyphenylene)azo))bis-, potassium sodium salt

Benzenesulfonic acid, 3,3'-(methylenebis((dihydroxyphenylene)azo))bis-, potassium sodium salt is a substance with a harmonised classification under EU CLP.

CAS 243869-48-9 Warning

01 · Identification

What Benzenesulfonic acid… is

Benzenesulfonic acid, 3,3'-(methylenebis((dihydroxyphenylene)azo))bis-, potassium sodium salt is a substance with a harmonised classification under EU CLP.

Under the GHS it carries the signal word Warning.

02 · Identifiers

Benzenesulfonic acid… identifiers and molecular data

Benzenesulfonic acid… CAS number and EC number

CAS number243869-48-9
EC number432-590-4
Index number (CLP Annex VI)611-157-00-5

Other names for Benzenesulfonic acid…

  • potassium sodium 3-[(E)-(6-{3,4-dihydroxy-2-[(Z)-(3-sulfonatophenyl)diazenyl]benzyl}-2,3-dihydroxyphenyl)diazenyl]benzenesulfonate

03 · GHS classification

Benzenesulfonic acid… hazard classification

Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.

Benzenesulfonic acid… pictograms and signal word

Signal wordWarning

Benzenesulfonic acid… hazard class and category

GHS hazard classes Benzenesulfonic acid… falls into
Hazard class Category From code Pictogram
Serious eye damage/eye irritation GHS chapter 3.3 Category 2A H319 GHS07
Hazardous to the aquatic environment - chronic GHS chapter 4.1 Category 3 H412

Benzenesulfonic acid… hazard statements (H-codes)

Hazard statements assigned to Benzenesulfonic acid…
CodeHazard statement
H319 Causes serious eye irritation.
H412 Harmful to aquatic life with long lasting effects.

This page lists only the codes assigned to Benzenesulfonic acid…. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.

Safety Data Sheet

Getting an SDS for Benzenesulfonic acid…

A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Benzenesulfonic acid… issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.

04 · Precautionary statements

Benzenesulfonic acid… precautionary statements

CLP Annex VI assigns 8 precautionary statements to Benzenesulfonic acid…. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.

Disposal

What has to happen to the contents and the empty container.

Reading the notation. is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.

05 · Names in the regulation

Benzenesulfonic acid… name in 23 EU languages

CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.

Language Name in CLP Annex VI Part 3
Bulgarian български калиева натриева сол на 3,3′-(метиленбис((дихидроксифенилен)азо))бисбензенсулфоновата киселина калиев натриев 3-[( E )-(6-{3,4-дихидрокси-2-[( Z )-(3-сулфонатофенил)диазенил]бензил}-2,3-дихидроксифенил)диазенил]бензенсулфонат
Spanish español Ácido bencenosulfónico, 3,3'-(metilen-bis((dihidroxifenilen)azo))bis-, sal de potasio y sodio 3-[( E )-(6{3,4-dihidroxi-2-[( Z )-(3-sulfonatofenil)diazenil]bencil}-2,3-dihidroxifenil)diazenil]bencenosulfonato de potasio y sodio
Czech čeština 3,3’-{methylenbis[(dihydroxyfenylen) azo]}bis(benzen-1-sulfonová kyselina), draselná a sodná sůl kalium-natrium-3-[(6-{3,4-dihydroxy-2-[(3-sulfonatofenyl)azo]benzyl}-2,3-dihydroxyfenyl)azo]benzen-1-sulfonát
Danish dansk benzensulfonsyre, 3,3'-(methylenbis((dihydroxyphenylen)azo))bis-, kaliumnatriumsalt kaliumnatrium-3-[( E )-(6-{3,4-dihydroxy-2-[( Z )-(3-sulfonatophenyl)diazenyl]benzyl}-2,3-dihydroxyphenyl)diazenyl]benzensulfonat
German Deutsch Benzolsulfonsäure, 3,3'-(Methylenbis((dihydroxyphenylen)azo))bis-, Kaliumnatriumsalz Kaliumnatrium-3-[( E )-(6{3,4-dihydroxy-2-}( Z )-(3-sulfonatophenyl)diazenyl]benzyl}-2,3-dihydroxyphenyl)diazenyl]benzolsulfonat
Estonian eesti 3,3′-(metüleenbis((dihüdroksüfenüleen)aso))bisbenseensulfoonhappe kaaliumnaatriumsool kaaliumnaatrium-3-[( E )-(6{3,4-dihüdroksü-2-[( Z )-(3-sulfonatofenüül)diasenüül]bensüül}-2,3-dihüdroksüfenüül)diasenüül]benseensulfonaat
Greek ελληνικά άλας του 3,3′-(μεθυλενοδις((διυδροξυφαινυλεν)αζω))δις(βενζολοσουλφονικού οξέος) με κάλιο-νάτριο 3-[( E )-(6{3,4-διυδροξυ-2-}( Z )-(3-σουλφονατοφαινυλο)διαζενυλο]βενζυλο}-2,3-διυδροξυφαινυλο)διαζενυλο]βενζολοσουλφονικό καλιονάτριο
English English benzenesulfonic acid, 3,3'-(methylenebis((dihydroxyphenylene)azo)) bis-, potassium sodium salt potassium sodium 3-[( E )-(6{3,4-dihydroxy-2-}( Z )-(3-sulfonatophenyl)diazenyl]benzyl}-2,3-dihydroxyphenyl)diazenyl]benzenesulfonate
French français acide benzènesulfonique, 3,3'-(méthylènebis((dihydroxyphénylène)azo)) bis-, sels de potassium et de sodium 3-[( E )-(6{3,4-dihydroxy-2-[( Z )-(3-sulfonatophényl)diazényl]benzyl}-2,3-dihydroxyphényl)diazényl]benzènesulfonate de potassium et de sodium
Croatian hrvatski benzensulfonska kiselina, 3,3′-(metilenbis((dihidroksifenilen)azo))bis-, kalijeva natrijeva sol kalijev natrijev 3-[( E )-(6{3,4-dihidroksi-2-[( Z )-(3-sulfonatofenil)diazenil]benzil}-2,3-dihidroksifenil)diazenil]benzensulfonat
Italian italiano acido benzenesolfonico, 3,3'-(metilenebis((diidrossifenilene)azo))bis-, sale di potassio e sodio 3-[( E )-(6-{3,4-diidrossi-2-[( Z )-(3-solfonatofenil)diazenil]benzil}-2,3-diidrossifenil)diazenil]benzenesolfonato di potassio e sodio
Latvian latviešu benzolsulfonskābe, 3,3'-(metilēnbis((dihidroksifenilēn)azo)) bis-, kālija, nātrija sāls kālija, nātrija 3-[( E )-(6{3,4-dihidroksi-2-}(Z)-(3-sulfonatofenil)diazenil]benzil}-2,3-dihidroksifenil)diazenil]benzolsulfonāts
Lithuanian lietuvių 3,3'-(metilenbis((dihidroksifenilen)azo))bis(benzensulfonrūgšties) kalio natrio druska kalio natrio 3-[( E )-(6-{3,4-dihidroksi-2-[( Z )-(3-sulfonatofenil)diazenil]benzil}-2,3-dihidroksifenil)diazenil]benzensulfonatas
Hungarian magyar benzolszulfonsav, 3,3'-(metilénbisz((dihidroxifenilén)azo))-bisz-, kálium/nátriumsó kálium/nátrium-3-[( E )-(6-{3,4-dihidroxi-2-}( Z )-(3-szulfonátofenil)diazenil]benzil}-2,3-dihidroxifenil)diazenil]benzolszulfonát
Maltese Malti aċidu benżensulfoniku, 3,3'-(metilenbis((diidrossifenilen)ażo)) bis-, melħ tas-sodju tal-potassju sodju tal-potassju 3-[( E )-(6{3,4-diidrossi-2-}( Z )-(3-sulfonatofenil)diażenil]benżil}-2,3-diidrossifenil)diażenil]benżensulfonat
Dutch Nederlands benzeensulfonzuur, 3,3'-(methyleenbis((dihydroxyfenyleen)azo))bis-, kaliumnatriumzout kaliumnatrium-3-[( E )-(6{3,4-dihydroxy-2-}( Z )-(3-sulfonatofenyl)diazenyl]benzyl}-2,3-dihydroxyfenyl)diazenyl]benzeensulfonaat
Polish polski sól sodowo-potasowa kwasu 3,3'-(metylenobis((dihydroksyfenyleno)azo))bis-benzenosulfonowego 3-[(E)-(6-{3,4-dihydroksy-2-[(Z)-(3-sulfonianofenylo)diazenylo]benzylo}-2,3-dihydroksyfenylo)diazenylobenzenosulfonian potasowo-sodowy
Portuguese português ácido 3,3'-(metilenobis((di-hidroxifenileno)azo))bis benzenossulfónico, sal de potássio e de sódio 3-[( E )-(6-{3,4-di-hidroxi-2-[( Z )-(3-sulfonatofenil)diazenil]benzil}-2,3-di-hidroxifenil)diazenil]benzenossulfonato de potássio e de sódio
Romanian română acid benzensulfonic, 3,3'-(metilenbis((dihidroxifenilen)azo))bis-, sare de potasiu și de sodiu 3-[( E )-(6-{3,4-dihidroxi-2-}( Z )-(3-sulfonatofenil)diazenil]benzil}-2,3-dihidroxifenil)diazenil]benzensulfonat de potasiu și de sodiu
Slovak slovenčina kálium-nátrium-3-[( E )-(6-{3,4-dihydroxy-2-[( Z )-3-sulfonátofenyldiazenyl]benzyl}-2,3-dihydroxyfenyl)diazenyl]benzénsulfonát
Slovenian slovenščina benzensulfonska kislina, 3,3'-(metilenbis((dihidroksifenilen)azo))bis-, kalijeva natrijeva sol kalijev natrijev 3-[( E )-(6-{3,4-dihidroksi-2-[( Z )-(3-sulfonatofenil)diazenil]benzil}-2,3-dihidroksifenil)diazenil]benzensulfonat
Finnish suomi bentseenisulfonihappo, 3,3'-(metyleenibis((dihydroksifenyleeni)atso))bis-, kaliumnatriumsuola kaliumnatrium-3-[( E )-(6-{3,4-dihydroksi-2-[( Z )-(3-sulfonaattofenyyli)diatsenyyli]bentsyyli}-2,3-dihydroksifenyyli)diatsenyyli]bentseenisulfonaatti
Swedish svenska bensensulfonsyra, 3,3'-(metylenbis((dihydroxifenylen)azo))bis-, kaliumnatriumsalt kaliumnatrium-3-[( E )-(6{3,4-dihydroxi-2-}( Z )-(3-sulfonatofenyl)diazenyl]bensyl}-2,3-dihydroxifenyl)diazenyl]bensensulfonat

All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.

06 · Label elements

Benzenesulfonic acid… GHS label elements

Everything CLP Annex VI fixes for Benzenesulfonic acid…, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.

GHS07 Exclamation mark pictogram

Warning

Benzenesulfonic acid…

  • Causes serious eye irritation.
  • Harmful to aquatic life with long lasting effects.
  • Wash thoroughly after handling.
  • Avoid release to the environment.
  • Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/
  • IF IN EYES:
  • Get medical advice/attention.
  • If eye irritation persists:
  • Remove contact lenses, if present and easy to do. Continue rinsing.
  • Dispose of contents/container to

Supplier name, address and telephone number· Product identifier·Nominal quantity

Need this as an actual label? Open Benzenesulfonic acid… in the GHS label constructor →

07 · Questions

Benzenesulfonic acid… — frequently asked questions

What is the CAS number of Benzenesulfonic acid…?

The CAS number of Benzenesulfonic acid… is 243869-48-9. Its EC number is 432-590-4.

What does a Benzenesulfonic acid… label have to show?

Under CLP Annex VI the label for Benzenesulfonic acid… carries the pictogram Exclamation mark and the signal word is Warning.

Is Benzenesulfonic acid… flammable?

CLP Annex VI assigns Benzenesulfonic acid… no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it.

Is Benzenesulfonic acid… a carcinogen?

CLP Annex VI records no harmonised carcinogenicity classification for Benzenesulfonic acid…. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.

Nearby

Substances next to Benzenesulfonic acid…

Keep going: substances starting with B, or search the whole database by name, CAS number, pictogram or signal word.

Get the free GHS / CLP / OSHA deadline calendar

Verified 2026–2029 compliance dates in one PDF — plus alerts when the rules change.