TERTIARY C5 ALCOHOL
Tert-Amyl Alcohol (TAA)
Tert-amyl alcohol (2-methyl-2-butanol) at ≥99.0% with water ≤0.1% and color ≤10 APHA, for agrochemical intermediates, pinacolone synthesis, synthetic musks and alkoxide bases. Supplied in 165 kg iron drums or ISO tanks.
Samples are available for qualification testing before a bulk order.
Overview
Tert-Amyl Alcohol (TAA)
Tert-amyl alcohol (TAA; 2-methyl-2-butanol, C₅H₁₂O) is a tertiary C5 alcohol. Because the hydroxyl group sits on a tertiary carbon, it does not oxidize to an aldehyde or ketone under normal conditions, which makes it useful both as a reaction solvent and as a source of the tert-amyl group.
Its main industrial outlets are agrochemicals — it is a raw material for pinacolone and, through it, for the triazole fungicides triadimefon and triadimenol (seed treatment) — together with synthetic musk fragrances, color-film couplers, and tert-amyl esters and ethers. It is also the alcohol used to make alkoxide bases such as potassium tert-amylate.
The grade on this page is ≥99.0% with water ≤0.1%, color ≤10 APHA and density 0.806–0.810 kg/L.
Product identification
Product identification
| Product Name | Tert-Amyl Alcohol (TAA) |
| Other names | 2-Methyl-2-butanol; tert-pentanol; TAA |
| CAS Number | 75-85-4 |
| HS Code | 2905.19 |
| Molecular Formula | C₅H₁₂O |
| Molecular Weight | 88.15 g/mol |
| Purity | ≥99.0% |
| Appearance | Colorless liquid |
Quality specification
Quality specification
Sales specification
| Parameter | Specification | Unit |
|---|---|---|
| Tert-amyl alcohol content | ≥ 99.0 | % |
| Color (Pt-Co) | ≤ 10 | APHA |
| Density | 0.806–0.810 | kg/L |
| Water | ≤ 0.1 | % |
What the limits mean
What the limits mean
Water ≤0.1%
Water consumes base when TAA is converted to alkoxides such as sodium or potassium tert-amylate, and it competes in other moisture-sensitive steps. A 0.1% ceiling keeps that loss small.
Color ≤10 APHA
A tight color limit suits fragrance and imaging-chemical uses, where color bodies can carry through to the finished product.
Density 0.806–0.810 kg/L
The narrow density window gives a quick identity check at goods-in, alongside the assay.
Applications
Applications by industry
1
Agrochemicals
Raw material for pinacolone and the triazole fungicides made from it.
Triazole fungicides triadimefon and triadimenol (seed treatment), through pinacolone
Pinacolone synthesis
2
Fragrances and imaging chemicals
Source of the tert-amyl group.
Synthetic musk intermediates
Color-film couplers
3
Solvents and chemical synthesis
Tertiary alcohol for solvent use and derivatives.
Reaction solvent
Tert-amyl esters and ethers
Alkoxide bases such as potassium tert-amylate
Technical Specifications
Physical and chemical properties
| Parameter | Value | Unit |
|---|---|---|
| Boiling point | 102.4 | °C |
| Melting point | -9 | °C |
| Flash point (closed cup) | 19 | °C |
| Solubility in water (25 °C) | About 11 | % (w/w) |
| Azeotrope with water | 87.4 °C (27.5% water by weight) | - |
Packaging & Shipping
Packaging, storage and transport
Packaging
Iron drum – 165 kg
ISO tank – Bulk
Shipping & Storage
Storage: Store in closed containers in a cool, well-ventilated area away from ignition sources and strong oxidizers. The closed-cup flash point is 19 °C.
Hazardous: Yes - DG transport required
Origin: Produced by a large-scale C5 processing partner in Shandong, China. Easier Materials is the export partner.
Commercial terms: MOQ, lead time and delivery terms are quoted per enquiry.
Regulatory and transport data
| Item | Value |
|---|---|
| EC number | 200-908-9 |
| UN number | UN 1105 (pentanols) |
| Transport class and packing group | Class 3 (flammable liquid), packing group II |
| GHS signal word | Danger |
| GHS hazard statements | H225 (highly flammable liquid and vapor); H315 (causes skin irritation); H332 (harmful if inhaled); H335 (may cause respiratory irritation). Some notifications add H312, H318 or H336. |
| HS code | 2905.19 (alcohols; saturated monohydric, not elsewhere specified in 2905.1) |
| Inventory listings | The substance is listed on the Australian AIIC. Registration dossiers for the substance are on the ECHA list (EU REACH); whether they cover a given import route is for the importer to confirm. |
| Further synonyms | tert-Pentyl alcohol; 2-methylbutan-2-ol; amylene hydrate (historical pharmaceutical name) |
Application chemistry
A documented industrial use of tert-amyl alcohol is as the solvent and metal-alkoxide source in diketopyrrolopyrrole (DPP) pigment manufacture. Sodium is dissolved in refluxing TAA (about 92–107 °C) to form sodium tert-amylate, and 4-chlorobenzonitrile and diisopropyl succinate are then added to give pigments such as Pigment Red 254. Sodium tert-amylate is sold as a strong, low-nucleophilicity base for deprotonation and for pharmaceutical synthesis.
As a solvent, TAA stays liquid at room temperature (melting point -9 °C), which makes it a practical alternative to tert-butyl alcohol; it boils at 102.4 °C. Supplier and hazard-database entries describe it as a solvent and intermediate in the synthesis of drugs and perfumes, with further uses in flavors, corrosion inhibitors, resins and coatings, and as a frother in ore flotation.
TAA is produced industrially mainly by acid-catalyzed hydration of 2-methyl-2-butene (isoamylene). It is a raw material for pinacolone and, through pinacolone, for the triazole fungicides triadimefon and triadimenol (a seed treatment); TAA is one of the published starting materials for pinacolone, together with isoamyl alcohol and isoamylene.
How this grade compares
Published grades of tert-amyl alcohol are listed at ≥99.0% (GC) with a density of about 0.81 g/cm³ at 20 °C, in line with the grade on this page (≥99.0%, density 0.806–0.810 kg/L, water ≤0.1%). Users who make sodium alkoxide from sodium metal, or who run other water-sensitive steps, state the water limit they need in the enquiry.
Storage and shelf life
Autoignition temperature 437 °C. Published closed-cup flash points are 19 °C and 20.5 °C.
Industrial tert-amyl alcohol is held in closed iron drums in a ventilated, cool, dry store, separated from oxidizers.
Documentation
Documentation
TDS and MSDS available on request
FAQ
Frequently Asked Questions
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