Monograph pubs.acs.org/doi/book/10.1021/acsreagents
Carbon Disulfide Part 4, Monographs for Reagent Chemicals: General Descriptions, Specifications, and Tests eISBN: 9780841230460 Tom Tyner Chair, ACS Committee on Analytical Reagents James Francis Secretary, ACS Committee on Analytical Reagents
ABSTRACT This monograph for Carbon Disulfide provides, in addition to common physical constants, a general description including typical appearance, applications, change in state (approximate), aqueous solubility, and density. The monograph also details the following specifications and corresponding tests for verifying that a substance meets ACS Reagent Grade specifications including: Assay, Color (APHA), Residue after Evaporation, Hydrogen Sulfide, Sulfur Dioxide, and Water.
CS2
Formula Wt 76.13
CAS No. 75-15-0
Note: Carbon disulfide should be supplied and stored in amber glass containers and protected from direct sunlight.
GENERAL DESCRIPTION Typical appearance . . . . . . . . Applications . . . . . . . . . . . . . Change in state (approximate) . Aqueous solubility . . . . . . . . . Density . . . . . . . . . . . . . . . .
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clear, colorless liquid solvent boiling point, 46 °C 0.3 g in 100 mL at 20 °C 1.26
SPECIFICATIONS Assay . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥99.9% CS2 Maximum Allowable Color (APHA) . . . . . . . . . . . . . . . . . . . . . . . 10 Residue after evaporation . . . . . . . . . . . . . . . 0.002% Hydrogen sulfide (H2S) . . . . . . . . . . . . . . . . . Passes test Sulfur dioxide (SO2) . . . . . . . . . . . . . . . . . . . Passes test Water (H2O) . . . . . . . . . . . . . . . . . . . . . . . . 0.05%
© 2017 American Chemical Society
A
DOI:10.1021/acsreagents.4085 ACS Reagent Chemicals, Part 4
ACS Reagent Chemicals
Monograph
pubs.acs.org/doi/book/10.1021/acsreagents
TESTS Assay Analyze the sample by gas chromatography using the general parameters cited in [Part 2: Chromatography; Recommended Procedures; Gas Chromatography]. The following specific conditions are also required. Column . . . . . . . . . . . . . . . . . . . . . . . . . . Type I, methyl silicone Measure the area under all peaks, and calculate the carbon disulfide content in area percent. Correct for water content.
Color (APHA) [Part 2: Measurement of Physical Properties; Color (APHA); Procedure for Color (APHA)].
Residue after Evaporation [Part 2: Gravimetric Methods; Residue after Evaporation]. In a well-ventilated fume hood, evaporate 50 g (40 mL) to dryness in a tared, preconditioned dish at 50–60 °C, and heat at 60 °C for 1 h.
Hydrogen Sulfide and Sulfur Dioxide In a well-ventilated fume hood, shake vigorously 25 g (20 mL) with 0.2 mL of 0.01 N iodine for 15 s in a glass-stoppered cylinder. The pink color should not disappear. (Limit for hydrogen sulfide is about 1.5 ppm; limit for sulfur dioxide is about 2.5 ppm.)
Water [Part 2: Titrimetric Methods; Water by the Karl Fischer Method; Coulometric Procedure; Coulometric Procedure for Samples Using Karl Fischer Reagent, Method 2]. Use 20 µL (25 mg) of the sample.
© 2017 American Chemical Society
B
DOI:10.1021/acsreagents.4085 ACS Reagent Chemicals, Part 4
