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Melting point standard 79-81°C

analytical standard

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Synonym(s):
Naphthalene
Empirical Formula (Hill Notation):
C10H8
CAS Number:
91-20-3
Molecular Weight:
128.17
Beilstein:
1421310
EC Number:
202-049-5
MDL number:
MFCD00001742
PubChem Substance ID:
329747268
NACRES:
NA.24

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

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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

Signal Word

Warning

Hazard Statements

H228 - H302 - H351 - H410

Hazard Classifications

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

Storage Class Code

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

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

危险化学品

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