Industrial chemicals · Taylor, TXTechnical Data Sheet
Technical Data Sheet
Isobutyl Alcohol 99% ACS Grade
ACS Grade · 99%
- CAS number
- 78-83-1
- UN number
- UN1212
- Hazard class · packing group
- 3 · PG III
- Structure
Structure · PubChem - Grade
- ACS Grade · 99%
- Signal word
- Danger
- Hazards
- Proper shipping name
- Isobutanol or isobutyl alcohol
Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer.
Identity & Composition
- Product Name
- Isobutyl Alcohol 99% ACS Grade
- Alliance Code
- isobutyl-alcohol-99-acs-grade
- Grade
- ACS Grade
- Concentration
- 99%
- CAS Number
- 78-83-1PubChem
- Formula
- C4H10OPubChem
- Molecular Weight
- 74.12PubChem
- Product Type
- Solution
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (2-methyl-1-propanol) | 99.0 % Min | 99.01 % | Gas chromatography | Interpreted |
| Titrable acid | 0.0005 meq/g Max | 0.00009 meq/g | Titration with standard base | Interpreted |
| Alkalinity | 0.0005 meq/g | 0.000018 meq/g | Titration with standard acid | Interpreted |
| Color (APHA) | 10 Max | 2 | Platinum-cobalt (APHA) visual comparison | Interpreted |
| Identity | IR passes test | Passes test | Infrared spectroscopy | Interpreted |
| Isobutanal (G.C.) | 0.05% | 0.05% | Gas chromatography | Interpreted |
| Peroxides (as H2O2) | 0.001% | 0.001% | Colorimetric peroxide test | Interpreted |
| Range of distillation (>96% dist.) | 107-109°C | 108 °C | Distillation | Interpreted |
| Residue after evaporation (non-volatile matter) | 0.001 % Max | 0.00019 % | Evaporation to dryness and gravimetric determination | Interpreted |
| Insoluble matter in water (solubility in water) | passes test | Passes test | Visual examination of aqueous dilution | Interpreted |
| Substances darkened by sulfuric acid | passes test | Passes test | Sulfuric acid darkening test | Interpreted |
| Water (H2O) | 0.1 % Max | 0.036 % | Karl Fischer | Interpreted |
| Carbonyl compounds (as butyraldehyde) | 0.01 % Max | 0.0029 % | Gas chromatography | 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 Grade | 99% | — | current | current |
| — | 99% | — | isobutyl-alcohol-99 | 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 | Adjudicated |
| Form | Liquid | Published reference |
| Odor | Alcohol-like, sweet musty odor | Adjudicated |
| pH | About 7 (80 g/L aqueous solution) | Adjudicated |
| Specific Gravity | 0.80 at 20 °C (water = 1) | Adjudicated |
| Density | 0.801-0.802 | Interpreted |
| Boiling Point | 106–108 °C (223–226 °F) | Adjudicated |
| Melting Point | -108 °C (-162 °F) | Adjudicated |
| Flash Point | 28–31 °C (82–88 °F), closed cup | Adjudicated |
| Vapor Pressure | 7–9 mmHg (9.5–12 hPa) at 20 °C | Adjudicated |
| Vapor Density | 2.6 (air = 1) | Adjudicated |
| Solubility (water) | Soluble in water (70–85 g/L at 20 °C); miscible with most organic solvents | Adjudicated |
| Refractive Index (nD 20) | 1.397-1.399 | Interpreted |
Polar solvent — purity vs. intended end-use (electronics, pharma, general industrial) is the dominant grade consideration. See application guidance for grade selection.
Materials of Construction
| Material | Rating | Conditions | Source |
|---|---|---|---|
| Steel (railway tank cars, tank containers, road tankers) | Compatible | Loading and transport of isobutanol as supplied (product spec on the same page: Isobutanol >99.8 %); no temperature or concentration limit stated | grupaazoty.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
- UN121249 CFR 172.101
- Hazard Class
- 3Adjudicated
- Packing Group
- IIIAdjudicated
- Proper Shipping Name
- Isobutanol or isobutyl alcoholAdjudicated
GHS / OSHA HCS 2024
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H226, H315, H318, H335, H336Adjudicated
- P-Codes (Precautionary Statements)
- P210, P233, P240, P241, P242, P243, P261, P264, P271, P280, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P313, P321, P332+P313, P362, P370+P378, P403+P233, P403+P235, P405, P501Adjudicated
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- 100 ppm TWAOSHA 29 CFR 1910.1000
- ACGIH TLV
- 50 ppm TWAAdjudicated
- NIOSH REL
- 50 ppm (150 mg/m³) TWAAdjudicated
- NIOSH IDLH
- 1,600 ppmAdjudicated
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.
Health & Fire Hazard
Acute Toxicology
- LD₅₀ Oral (rat)
- 2,460–3,350 mg/kg (rat)Adjudicated
- LD₅₀ Dermal (rabbit)
- 2,460–3,400 mg/kgAdjudicated
- LC₅₀ Inhalation (rat, 4 h)
- > 18 mg/L (vapor, rat, 6 h); 24.6 mg/L (4 h)Adjudicated
Acute toxicology values from SDS Section 11 or NIOSH RTECS.
Supplier Qualification Packet
One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Isobutyl Alcohol 99% ACS Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Applications
- Analytical reagent for laboratory analysis, meeting ACS specifications and USP / Ph. Eur. reagent requirements.itwreagents.com
- Sold for research use only, restricted to qualified laboratories and businesses.chemsavers.com
- Used in organic synthesis, as a chemical intermediate, and as a solvent in coating applications.productcatalog.eastman.com
- Used in the production of esters, paints and lacquers (as solvent and flow/viscosity modifier), plasticizer additives for plastics, and melamine and carbamide resins.grupaazoty.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
- Keep tightly closed in a cool, well-ventilated flammables area away from ignition sources and oxidizers. Store locked up. Ground and bond containers.Adjudicated
- Handling Precautions
- Use chemical-resistant gloves and splash goggles. Bond and ground during transfer to prevent static accumulation. Eliminate ignition sources within vapor envelope.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Strong oxidizing agents and chromium(VI) oxide; alkali and alkaline-earth metals; aluminum; rubber and some plastics.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)
UN1212, Isobutanol or isobutyl alcohol, 3, PG III
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
NMFC Class
77.5
Placard
Flammable Liquid
Packing Group
PG III
Revision History
Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.7 | 2026-10-08 | Canonical data updated: 24 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.6 | 2026-10-07 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.5 | 2026-10-05 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.4 | 2026-09-30 | Canonical data updated: 4 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-08-05 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-07-22 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-07-17 | Canonical data re-verified: 5 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.