Industrial chemicals · Taylor, TXTechnical Data Sheet
n-Heptane 99% ACS
ACS · 99%
- CAS number
- 142-82-5
- UN number
- UN1206
- Hazard class · packing group
- 3 · PG II
- Structure
Structure · PubChem - Grade
- ACS · 99%
- Signal word
- Danger
- Hazards
- Proper shipping name
- Heptanes
Identity & Composition
- Product Name
- n-Heptane 99% ACS
- Alliance Code
- n-heptane-99-acs
- Grade
- ACS
- Concentration
- 99%
- CAS Number
- 142-82-5PubChem
- Formula
- C7H16PubChem
- Molecular Weight
- —PubChem
- Product Type
- Solution
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (n-Heptane) | 99 - 100 % wt. | 99.10 % | Gas Chromatography | Interpreted |
| Identity | Conforms | Passes test | IR Spectra (USP <851>) | Interpreted |
| Residue after evaporation | 0.001 % max | 0.00025 % | — | Interpreted |
| Sulfur compounds (as S) | 0.005 % max | 0.000043 % | — | Interpreted |
| Thiophene | Pass | Passes test | — | Interpreted |
| Substances darkened by sulfuric acid | Passes test | Passes test | ACS monograph sulfuric acid test (visual) | Interpreted |
| acidity | 0.001 % max | 0.00040 % | — | 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 | 99% | — | current | current |
| — | 99% | — | n-heptane-99-technical | 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 |
| Color | 0 - 10 APHA | Interpreted |
| Odor | Gasoline-like (petroleum) odor | Adjudicated |
| Specific Gravity | 0.68 at 20 °C (water = 1) | Adjudicated |
| Density | 0.68 - 0.695 | Interpreted |
| Boiling Point | 98 °C (208 °F) | Adjudicated |
| Melting Point | -91 °C (-131 °F) | Adjudicated |
| Flash Point | -4 °C (25 °F), closed cup | Adjudicated |
| Vapor Pressure | 36–40 mmHg (48–53 hPa) at 20–22 °C | Adjudicated |
| Vapor Density | 3.5 (air = 1) | Adjudicated |
| Solubility (water) | Practically insoluble in water (about 0.05 g/L at 20 °C) | Adjudicated |
| Refractive Index (nD 20) | 1.3868 - 1.389 | Interpreted |
| Viscosity | 0.4 mPa·s at 20 °C | Adjudicated |
Materials of ConstructionService envelope ≈ 99%
| Material | Rating | Max T (°C) | Notes | Source |
|---|---|---|---|---|
Buna-N (NBR) elastomer | Good | 80 | Good for non-aromatic hydrocarbons; poor for aromatics. | Parker O-ring Chemical Compatibility |
EPDM elastomer | Not recommended | — | Swells in hydrocarbons; never use. | Parker O-ring Chemical Compatibility |
Viton (FKM) elastomer | Excellent | 100 | Standard for hydrocarbon service. | Parker O-ring Chemical Compatibility |
PTFE fluoropolymer | Excellent | 200 | Universal. | Cole-Parmer Chemical Compatibility |
316L Stainless Steel metal | Excellent | 100 | Inert. | Cole-Parmer Chemical Compatibility |
Carbon Steel metal | Good | 80 | Acceptable for dry hydrocarbons. | Cole-Parmer Chemical Compatibility |
HDPE thermoplastic | Not recommended | — | Aromatic solvents swell and dissolve HDPE. | Cole-Parmer Chemical Compatibility |
Ratings reflect the service envelope (concentration × temperature) shown. Always confirm against your specific duty cycle and contact-time before equipment selection. The most cautious rating across overlapping references is shown.
Materials Selection Tool
Showing 7 of 7 material ratings within the selected envelope.
| Material | Rating | Max T (°C) | Notes |
|---|---|---|---|
Buna-N (NBR) elastomer | Good | 80 | Good for non-aromatic hydrocarbons; poor for aromatics. |
EPDM elastomer | Not recommended | — | Swells in hydrocarbons; never use. |
Viton (FKM) elastomer | Excellent | 100 | Standard for hydrocarbon service. |
PTFE fluoropolymer | Excellent | 200 | Universal. |
316L Stainless Steel metal | Excellent | 100 | Inert. |
Carbon Steel metal | Good | 80 | Acceptable for dry hydrocarbons. |
HDPE thermoplastic | Not recommended | — | Aromatic solvents swell and dissolve HDPE. |
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN120649 CFR 172.101
- Hazard Class
- 3Adjudicated
- Packing Group
- IIAdjudicated
- Proper Shipping Name
- HeptanesAdjudicated
GHS / OSHA HCS 2024
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H225, H304, H315, H336, H410Adjudicated
- P-Codes (Precautionary Statements)
- P210, P233, P240, P241, P242, P243, P261, P264, P271, P273, P280, P301+P310, P302+P352, P303+P361+P353, P304+P340, P312, P321, P331, P332+P313, P362, P370+P378, P391, P403+P233, P403+P235, P405, P501Adjudicated
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- 500 ppm TWAOSHA 29 CFR 1910.1000
- ACGIH TLV
- —no canonical
- NIOSH REL
- 85 ppm TWA; 440 ppm Ceiling (15 min)Adjudicated
- NIOSH IDLH
- 750 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)
- > 5,000 mg/kg (rat)Adjudicated
- LD₅₀ Dermal (rabbit)
- 3,000 mg/kgAdjudicated
- LC₅₀ Inhalation (rat, 4 h)
- 103 mg/L (vapor, rat, 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 n-Heptane 99% ACS. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Catalog EquivalentsCross-reference vs major chemical suppliers
Sigma-Aldrich
| SKU | Grade | Conc. | Match | Notes |
|---|---|---|---|---|
| 246654 | ACS Reagent | 99% | Unverified candidate | ACS Reagent ≥99% |
Cross-references are informational. Confirm against the manufacturer's current specification before substitution. Competitor trademarks are property of their respective owners.
Applications
- Fast to medium evaporating aliphatic solvent with excellent solvency for non-polar substances, fats, and oilschemceed.com
- Chemically inert solvent for sensitive reactions, such as solution production of synthetic rubbers like polybutadienechemceed.com
- Diluent for heavy greases and oils; component of paints, varnishes, and adhesiveschemceed.com
- Inert medium for purification, recrystallization, and washing of active pharmaceutical ingredients (APIs); source states this for its High Purity, Greater than 99% gradechemceed.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. Ground and bond containers.Adjudicated
- Handling Precautions
- Eliminate ignition sources. Use chemical-resistant nitrile or PVA gloves. Bond and ground all transfer equipment. Vapors heavier than air — control ventilation accordingly.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Strong oxidizing agents (chlorates, nitrates, peroxides); chlorine with phosphorus.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)
UN1206, Heptanes, 3, PG II
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-06-18 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.6 | 2026-10-08 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.5 | 2026-10-07 | Canonical data updated: 26 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: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-06-18 | Canonical data re-verified: 3 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.