Industrial chemicals · Taylor, TXTechnical Data Sheet
Ammonium Hydroxide 20% ACS Grade
ACS · 20%
- CAS number
- 1336-21-6
- UN number
- UN2672
- Hazard class · packing group
- 8 · PG III
- Structure
Structure · PubChem - Grade
- ACS · 20%
- Signal word
- Danger
- Hazards
- Proper shipping name
- Ammonia solution, relative density between 0.880 and 0.957 at 15 degrees C in water, with more than 10 percent but not more than 35 percent ammonia
Identity & Composition
- Product Name
- Ammonium Hydroxide 20% ACS Grade
- Alliance Code
- ammonium-hydroxide-20-acs-grade
- Grade
- ACS
- Concentration
- 20%
- CAS Number
- 1336-21-6PubChem
- Formula
- —PubChem
- Molecular Weight
- —PubChem
- Product Type
- Solution
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (NH3) | 19.7 - 20.3 % | 20.01 % | Titration | Interpreted |
| Carbon dioxide (CO2) | 0.0014% max | 0.00043 % | — | Interpreted |
| Chloride (Cl) | 0.47 ppm max | 0.12 ppm | — | Interpreted |
| Heavy metals (as Pb) | 0.35 ppm max | 0.041 ppm | — | Interpreted |
| Iron (Fe) | 0.14 ppm max | 0.016 ppm | — | Interpreted |
| Nitrate (NO3) | 1.5 ppm max | 0.23 ppm | — | Interpreted |
| Phosphate (PO4) | 1.7 ppm max | 0.081 ppm | — | Interpreted |
| Residue after ignition | 0.0014 % max | 0.00026 % | — | Interpreted |
| Sulfur compounds (as SO4) | 1.4 ppm max | 0.23 ppm | — | Interpreted |
| Substances reducing permanganate | To pass Test | Passes test | — | Interpreted |
| Composition | 20 % ammonium hydroxide in deionized water, by weight | Conforms | By formulation; confirmed by specific gravity | Interpreted |
Values are reproduced from the current product reference. Source labels do not by themselves establish a supplier guarantee or a test result for your lot. Confirm applicable acceptance limits and request lot-specific documentation.
Available GradesSame CAS, alternate grades and concentrations
| Grade | Concentration | Typical Assay | SKU | TDS |
|---|---|---|---|---|
| This grade ACS | 20% | — | current | current |
| ACS Grade | 29% | — | ammonium-hydroxide-29-acs-grade | View TDS → |
| Technical Grade | 29% | — | ammonium-hydroxide-29-technical-grade | View TDS → |
| Technical | 20% | — | ammonium-hydroxide-20-technical-grade | View TDS → |
| ACS | 15% | — | ammonium-hydroxide-15-acs-grade | View TDS → |
| Technical | 15% | — | ammonium-hydroxide-15-technical-grade | View TDS → |
| ACS | 10% | — | ammonium-hydroxide-10-acs-grade | View TDS → |
| Technical | 10% | — | ammonium-hydroxide-10-technical-grade | View TDS → |
| ACS | 5% | — | ammonium-hydroxide-5-acs-grade | View TDS → |
| Technical | 5% | — | ammonium-hydroxide-5-technical-grade | View TDS → |
Typical assay shown is the rolling-window mean from the sibling product's most recent lots. Grade selection drives downstream end-use — verify the sibling grade matches your specification before substitution.
Physical & Chemical Properties
| Property | Value | Source |
|---|---|---|
| Appearance | Clear, colorless liquid with strong ammonia odor | Adjudicated |
| Color | Clear, Colorless | Interpreted |
| Boiling Point | 38°C | Adjudicated |
| Melting Point | -57.5°C | Adjudicated |
Materials of Construction
| Material | Rating | Conditions | Source |
|---|---|---|---|
| copper and copper alloys | Not recommended | — | tannerind.com |
| aluminum alloys | Not recommended | — | tannerind.com |
| galvanized surfaces | Not recommended | — | tannerind.com |
| copper, copper alloys, aluminum alloys, and galvanized surfaces | Not recommended | — | tannerind.com |
Compatibility is drawn from published manufacturer and supplier documentation for this product; each rating is sourced. Confirm against your specific duty cycle before equipment selection.
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN2672Adjudicated
- Hazard Class
- 8Adjudicated
- Packing Group
- IIIAdjudicated
- Proper Shipping Name
- Ammonia solution, relative density between 0.880 and 0.957 at 15 degrees C in water, with more than 10 percent but not more than 35 percent ammoniaAdjudicated
GHS / OSHA HCS 2024
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H314, H335, H400Adjudicated
- P-Codes (Precautionary Statements)
- P234, P260, P261, P264, P271, P273, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P391, P403+P233, P405, P501Adjudicated
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- 50 ppm TWAOSHA 29 CFR 1910.1000
- ACGIH TLV
- —no canonical
- NIOSH REL
- 25 ppm TWA / 35 ppm STELNIOSH Pocket Guide
- NIOSH IDLH
- 300 ppmNIOSH Pocket Guide
Transport descriptions reflect 49 CFR 172.101 lookup at time of publication. Sourced data: NIOSH Pocket Guide for REL/IDLH, OSHA Z-Tables for PEL. Always verify against the latest regulatory text before shipment-critical decisions.
Supplier Qualification Packet
One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Ammonium Hydroxide 20% ACS Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Applications
- Acid neutralizationtannerind.com
- Used in the chemical and petroleum industries and in agriculture, resins, polymers, acid neutralization, water treatment, cogeneration NOx scrubbing and explosivestannerind.com
- Feedstock for preparing other ammonium compounds such as urea, ammonium carbonate and ammonium sulfatelaballey.com
- Laboratory solvent, pharmaceutical manufacturing, polymer manufacturing, household cleaning reagent, and food additive / acidity regulatorlaballey.com
- Buffers, ceramics, collagen sausage casing, detergents, fertilizer, hair bleaching and hair colorants, I&I cleaners, ink, photographic chemistry, rayon, refrigeration, selective catalytic reduction (SCR), textiles and window cleanerchemceed.com
- Reagent for compounding analytical test solutionsuspbpep.com
Applications are drawn from published manufacturer and supplier documentation; each is sourced. Suitability for a specific use is the buyer's to confirm.
Storage & Handling
- Recommended Storage
- Store tightly closed in a cool, well-ventilated area out of sunlight; open containers slowly, as pressure may build up. Use steel or polyethylene, never copper, brass, bronze, zinc or galvanized fittings. Keep away from bleach, acids and halogens.Adjudicated
- Handling Precautions
- Use in ventilation or with respiratory protection — vapour is the primary exposure. Chemical splash goggles and gloves. Open and transfer cool; pressure can build in warm sealed containers. Neutralization with acid is exothermic.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Bleach and other hypochlorites, chlorine, bromine and iodine (toxic chloramines and explosive compounds); mercury, silver and silver oxide, gold (explosive compounds); strong acids (violent, heat); strong oxidizers. Corrodes copper, brass, bronze, zinc, galvanized surfaces and aluminum alloys.Adjudicated
- Shelf Life
- Consult Technical Services for product-specific shelf life
For full hazard, PPE, and emergency response guidance, refer to the Safety Data Sheet (SDS) for this product. The SDS controls in all cases where guidance differs.
Packaging & Logistics
Shipping Description (US DOT)
UN2672, Ammonia solution, relative density between 0.880 and 0.957 at 15 degrees C in water, with more than 10 percent but not more than 35 percent ammonia, 8, PG III
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.8 | 2026-10-13 | Canonical data updated: 4 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.7 | 2026-09-30 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.6 | 2026-08-27 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.5 | 2026-08-19 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.4 | 2026-08-05 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-07-22 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-07-17 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-07-17 | Canonical data re-verified: 6 fields updated against independent vendor SDSs, CLP Annex VI, 49 CFR, and OSHA HazCom 2024 (GHS classification, hazard/precautionary codes, signal word, physical properties as applicable).
| canonical_change |
| 1.0 | 2026-05-20 | Initial URL-first TDS published from canonical chemistry registry. | initial |
This Technical Data Sheet is provided for technical reference. The Safety Data Sheet (SDS) controls in all cases where guidance differs. Values reflect Alliance Chemical canonical data at time of generation; subsequent revisions are recorded in the Revision History above.