Safety data sheet reference · CAS 7664-41-7
Ammonia SDS
also: ammonia MSDS · safety data sheet · NH3 · CAS 7664-41-7 · EC 231-635-3 · anhydrous ammonia
Official PDF from supplier
This page is a reference, not the legal document.
CAS number
7664-41-7
EC number
231-635-3
CLP Annex VI index
007-001-00-5
§ 02 · Hazards identification
Harmonised EU classification
CLP Annex VI · Index 007-001-00-5. A supplier SDS may add self-classified hazards — this is the legal minimum.
Concentration / form dependent — CLP Note B
Ammonia is placed on the market in different concentrations or forms whose classification can differ. This page shows the harmonised Annex VI entry for the substance as such — always match the supplier's SDS to the concentration and form you actually use.
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.
⚠ Water-Reactive
⛔ Never store with
↔ Keep separate
Full interactive verdict — reactions, gas release on contact, ADR forms →
§ 09 · Physical and chemical properties
Measured properties
Fire-relevant values first — flash point and explosion limits decide the storage and ventilation regime.
Explosion limits
16 – 25 %
LEL / UEL in air, vol.
Autoignition
651.1 °C
Source: CAMEO Chemicals (NOAA, public domain); per-value source references stored in the database.
§ 10 · Stability and reactivity
Reactive group (CAMEO/NOAA): Bases, Weak, Water and Aqueous Solutions. Our database documents 32 incompatible and 41 caution reaction-partner groups for ammonia — including which combinations release gas on contact. See the per-partner breakdown with gas release →
32
Incompatible
41
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 1005
Proper shipping name
AMMONIA, ANHYDROUS
Class · PG
2
Classification code
2TC
Transport category
1
ADR labels
2.3, 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 2073
Proper shipping name
AMMONIA SOLUTION, relative density less than 0.880 at 15 °C in water, with more than 35 % but not more than 50 % ammonia
Class · PG
2
Classification code
4A
Transport category
3
ADR labels
2.2
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 2672
Proper shipping name
AMMONIA SOLUTION, relative density between 0.880 and 0.957 at 15 °C in water, with more than 10 % but not more than 35 % ammonia
Class · PG
8 · III
Classification code
C5
Transport category
3
ADR labels
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 3318
Proper shipping name
AMMONIA SOLUTION, relative density less than 0.880 at 15 °C in water, with more than 50 % ammonia
Class · PG
2
Classification code
4TC
Transport category
1
ADR labels
2.3, 8
Hazard ID (Kemler) / UN plate
Top: hazard identification number (Kemler). Bottom: UN number — as carried on the orange plate of the transport unit.
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 "ammonia MSDS" and a "ammonia SDS" refer to the same document — today it is issued as an SDS. Full breakdown of the differences →
Other bases in our database
- ammonia ....% 1336-21-6
- ammonium polysulphides 9080-17-5
- beryllium oxide 1304-56-9
- disodium sulfide; sodium sulfide 1313-82-2
- ethyleneimine; aziridine 151-56-4
- hydrazine 302-01-2
- hydroxylamine ....% [> 55 % in aqueous solution] 7803-49-8
- methyl-ONN-azoxymethyl acetate; methyl azoxy methyl acetate 592-62-1
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 ammonia
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 "ammonia MSDS" is today issued as an SDS.
What GHS pictograms does ammonia require?
Under the harmonised EU classification (CLP Annex VI), ammonia carries GHS04 and GHS05 and GHS06 and GHS09 with the signal word "Danger". Hazard statements: H221, H331, H314, H400. A supplier's SDS may add self-classified hazards on top of this harmonised minimum.
What should ammonia never be stored with?
Based on its storage classes (Bases, Compressed gases, Acute toxics), ammonia must not share storage with: Mineral acids; Organic acids; Oxidizing acids; Water-reactives. Verify against the supplier's SDS sections 7 and 10 before finalising storage.
Where can I download an official ammonia 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.