Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
1.04390
n-Heptane
for liquid chromatography LiChrosolv®
Synonym(s):
Heptane
About This Item
83 mmHg ( 37.7 °C)
Recommended Products
vapor density
3.5 (vs air)
Quality Level
vapor pressure
40 mmHg ( 20 °C)
83 mmHg ( 37.7 °C)
description
isocratic
product line
LiChrosolv®
Assay
≥99.3% (GC)
form
liquid
autoignition temp.
433 °F
potency
>5000 mg/kg LD50, oral (Rat)
>2000 mg/kg LD50, skin (Rabbit)
expl. lim.
7 %
greener alternative product characteristics
Safer Solvents and Auxiliaries
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sustainability
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technique(s)
HPLC: suitable
impurities
≤0.0002 meq/g Acidity
≤0.0002 meq/g Alkalinity
≤0.005% Water
evapn. residue
≤2.0 mg/L
transmittance
210 nm, ≥50%
220 nm, ≥80%
245 nm, ≥98%
refractive index
n20/D 1.387 (lit.)
bp
98 °C (lit.)
mp
−91 °C (lit.)
transition temp
flash point -4 °C
solubility
0.05 g/L
density
0.684 g/mL at 25 °C (lit.)
greener alternative category
storage temp.
2-30°C
SMILES string
CCCCCCC
InChI
1S/C7H16/c1-3-5-7-6-4-2/h3-7H2,1-2H3
InChI key
IMNFDUFMRHMDMM-UHFFFAOYSA-N
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General description
Application
Features and Benefits
- suitability tested and specified for UHPLC-MS and UHPLC-UV: for analytical flexibility
- specified quality in positive and negative electrospray ionization (ESI) and atmospheric-pressure chemical ionization-mass spectrometry (APCI-MS) for lowest detection limits and confidence in analyses in all important MS modes (test 1)
—ESI/APCI (-) < 10 ppb
- lowest impurity profile: for interference-free baselines (test 2)
- microfiltered through 0.2 μm filter (test 3) to provide:
—reduced risk of column clogging
- packaged in borosilicate glass bottles for minimized contamination with metal ions
- lowest levels of trace metal impurities to minimize metal ion adduct formation
- lowest level of polyethylene glycol (PEG) impurities in UHPLC-MS solvent lineup (PEG S/N signal-to-noise-ratio < 50)
Preparation Note
Analysis Note
Identity (IR): conforms
Evaporation residue: ≤ 2.0 mg/l
Water: ≤ 0.005 %
Acidity: ≤ 0.0002 meq/g
Alkalinity: ≤ 0.0002 meq/g
Transmission (at 210 nm): ≥ 50 %
Transmission (at 220 nm): ≥ 80 %
Transmission (from 245 nm): ≥ 98 %
Filtered by 0.2 µm filter
Other Notes
Legal Information
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Aquatic Acute 1 - Aquatic Chronic 1 - Asp. Tox. 1 - Flam. Liq. 2 - Skin Irrit. 2 - STOT SE 3
Target Organs
Respiratory system
Storage Class Code
3 - Flammable liquids
WGK
WGK 2
Flash Point(F)
24.8 °F - closed cup
Flash Point(C)
-4 °C - closed cup
Certificates of Analysis (COA)
Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.
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Articles
HPTLC separation followed by UV detection of the bitter acid content in various hop samples.
HPTLC separation followed by UV detection of the bitter acid content in various hop samples.
HPTLC separation followed by UV detection of the bitter acid content in various hop samples.
HPTLC separation followed by UV detection of the bitter acid content in various hop samples.
Protocols
HPTLC was used to analyze caffeine in coffee. Filtration of coffee through a PTFE syringe filter was the only sample preparation. Quantitation was conducted with a TLC scanner.
HPTLC was used to analyze caffeine in coffee. Filtration of coffee through a PTFE syringe filter was the only sample preparation. Quantitation was conducted with a TLC scanner.
HPTLC was used to analyze caffeine in coffee. Filtration of coffee through a PTFE syringe filter was the only sample preparation. Quantitation was conducted with a TLC scanner.
HPTLC was used to analyze caffeine in coffee. Filtration of coffee through a PTFE syringe filter was the only sample preparation. Quantitation was conducted with a TLC scanner.
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How is shipping temperature determined? And how is it related to the product storage temperature?
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How can I determine the shelf life / expiration / retest date of this product?
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If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdfHelpful?
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