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01422

Melting point standard 79-81°C

analytical standard

Synonym(s):

Naphthalene

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About This Item

Empirical Formula (Hill Notation):
C10H8
CAS Number:
91-20-3
Molecular Weight:
128.17
UNSPSC Code:
20121904
NACRES:
NA.24
PubChem Substance ID:
329747268
EC Number:
202-049-5
Beilstein/REAXYS Number:
1421310
MDL number:
MFCD00001742
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grade

analytical standard

Quality Level

100

vapor density

4.4 (vs air)

vapor pressure

0.03 mmHg ( 25 °C)

autoignition temp.

978 °F

shelf life

limited shelf life, expiry date on the label

expl. lim.

5.9 %

bp

218 °C (lit.)

mp

79-81 °C (±0.3°C), 80-82 °C (lit.)

application(s)

food and beverages
pharmaceutical

SMILES string

c1ccc2ccccc2c1

InChI

1S/C10H8/c1-2-6-10-8-4-3-7-9(10)5-1/h1-8H

InChI key

UFWIBTONFRDIAS-UHFFFAOYSA-N

General description

Melting point standard 79-81 °C, naphthalene is a non-polar hydrocarbon for use in the characterization of pure chemicals and pharmaceutical compounds. The melting point value is determined with an average of 6 to 12 measurements using a Büchi B-545 instrument that is calibrated against primary standards.

Application

Naphthalene melting point standard 79-81 °C is an analytical standard used to calibrate melting point instruments, operating in the thermodynamic mode of analysis. It′s also applicable in R&D labs for chemical quality control (QC) and quality assurance (QA) to identify solid crystalline substances and to check their purity.
Additionally, this mp standard is also used as a temperature calibration standard in thermal studies.

Features and Benefits

  • Melting point calibration standard traceable to primary standards (LGC, London)
  • Grade: Analytical Standard
  • Standard deviation up to ± 0.3 °C
  • Provided with certificates of analysis and safety data sheet

signalword

Warning

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 2 - Flam. Sol. 2

Storage Class

4.1B - Flammable solid hazardous materials

wgk

WGK 3

flash_point_f

173.3 °F - closed cup

flash_point_c

78.5 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

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