Safety data sheet reference · CAS 7782-50-5
Chlorine SDS
also: chlorine MSDS · safety data sheet · Cl2 · CAS 7782-50-5 · EC 231-959-5 · chlorine gas
Official PDF from supplier
This page is a reference, not the legal document.
CAS number
7782-50-5
EC number
231-959-5
CLP Annex VI index
017-001-00-7
§ 02 · Hazards identification
Harmonised EU classification
CLP Annex VI · Index 017-001-00-7. A supplier SDS may add self-classified hazards — this is the legal minimum.
Precautionary statements
§ 07 · Handling and storage
Computed storage verdict
Derived from CLP Annex VI classification and CAMEO reactive-group data — not copied from a PDF.
⚠ Strong Oxidizing Agent⚠ Water-Reactive
⛔ Never store with
↔ Keep separate
Full interactive verdict — reactions, gas release on contact, ADR forms →
§ 09 · Physical and chemical properties
Measured properties
Source: CAMEO Chemicals (NOAA, public domain); per-value source references stored in the database.
§ 10 · Stability and reactivity
Reactive group (CAMEO/NOAA): Halogenating Agents, Oxidizing Agents, Strong. Our database documents 117 incompatible and 12 caution reaction-partner groups for chlorine — including which combinations release gas on contact. See the per-partner breakdown with gas release →
117
Incompatible
12
Caution
§ 13 · Disposal considerations
Dispose of waste and residues in accordance with local and national regulations — in the EU under the Waste Framework Directive 2008/98/EC. Never discharge to drains or municipal waste; hand contaminated packaging and unused product to an authorised waste-disposal company. The supplier's SDS section 13 lists the applicable waste codes for the specific product.
§ 14 · Transport information
Road transport — ADR 2025
UN number
UN 1017
Proper shipping name
CHLORINE
Class · PG
2
Classification code
2TOC
Transport category
1
ADR labels
2.3, 5.1, 8
Hazard ID (Kemler) / UN plate
Top: hazard identification number (Kemler). Bottom: UN number — as carried on the orange plate of the transport unit.
UN number
UN 3520
Proper shipping name
CHLORINE, ADSORBED
Class · PG
2
Classification code
9TOC
Transport category
1
ADR labels
2.3, 5.1, 8
Source: UN ADR 2025 (ECE/TRANS/352), Table A. Road (ADR) only — for sea (IMDG) and air (IATA), consult the supplier's SDS §14.
MSDS vs SDS
MSDS vs SDS: is there a difference?
MSDS (Material Safety Data Sheet) is the older name for the same document. In the US, OSHA's Hazard Communication Standard (2012) adopted the GHS-standardised 16-section Safety Data Sheet; in the EU the format is set by REACH Annex II. So a "chlorine MSDS" and a "chlorine SDS" refer to the same document — today it is issued as an SDS. Full breakdown of the differences →
Other oxidizers in our database
- 1,3-dichloro-5-ethyl-5-methylimidazolidine-2,4-dione 89415-87-2
- ammonium dichromate 7789-09-5
- ammonium perchlorate; [containing ≥ 80 % of 0-30 µm particles] 7790-98-9
- antimony pentachloride 7647-18-9
- antimony trichloride 10025-91-9
- antimony trifluoride 7783-56-4
- azoxybenzene 495-48-7
- barium chlorate 13477-00-4
Compliance hub
From classification to SDS
The classification above corresponds to Section 2 of a Safety Data Sheet. Learn how a compliant 16-section SDS is structured and authored →
GHS label maker
Build the label for chlorine
Pictograms, signal word and H-statements combined into a compliant label layout →
§ 16 · Sources
- Classification: Regulation (EC) No 1272/2008 (CLP), Annex VI
- Transport: UN ADR 2025 (UNECE), Table A
- Reactivity: NOAA CAMEO Chemicals reactive-group matrix (public domain)
- Physical properties: CAMEO Chemicals (NOAA, public domain) — per-value source references stored in the database
- Substance data: PubChem · ECHA
Reference aid only. This page summarises the harmonised EU classification and computed storage guidance — it is not a Safety Data Sheet and does not replace one. Always verify hazards, handling and storage against the supplier's SDS (sections 7 and 10) and local regulations before use. Page updated 2026-07-27.
Frequently asked questions
Is an MSDS the same as an SDS?
In practice, yes. MSDS (Material Safety Data Sheet) is the older name for the same document. In the US, OSHA's Hazard Communication Standard (2012) adopted the GHS-standardised 16-section Safety Data Sheet; in the EU the SDS format is set by REACH Annex II. A document you find labelled "chlorine MSDS" is today issued as an SDS.
What GHS pictograms does chlorine require?
Under the harmonised EU classification (CLP Annex VI), chlorine carries GHS03 and GHS04 and GHS06 and GHS09 with the signal word "Danger". Hazard statements: H270, H331, H335, H315, H319, H400. A supplier's SDS may add self-classified hazards on top of this harmonised minimum.
What should chlorine never be stored with?
Based on its storage classes (Oxidizers, Acute toxics), chlorine must not share storage with: Cyanides & sulfides; Flammable liquids; Flammable solids; Mineral acids; Organic acids; Organic peroxides & self-reactives; Reactive metals; Water-reactives. Verify against the supplier's SDS sections 7 and 10 before finalising storage.
Where can I download an official chlorine SDS PDF?
From your own supplier — an SDS is issued per product and supplier, so the correct PDF for an inspection is the one matching the product you actually purchased. The supplier links on this page lead to the official SDS libraries of major distributors.