Monograph pubs.acs.org/doi/book/10.1021/acsreagents
Formic Acid, 88% 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 Formic Acid, 88% provides, in addition to common physical constants, a general description including typical appearance, applications, change in state (approximate), aqueous solubility, density, and pKa. The monograph also details the following specifications and corresponding tests for verifying that a substance meets ACS Reagent Grade specifications including: Sulfate, Heavy Metals, and Iron.
HCOOH
Formula Wt 46.03
CAS No. 64-18-6
GENERAL DESCRIPTION Typical appearance . . . . . . . . Applications . . . . . . . . . . . . . Change in state (approximate) . Aqueous solubility . . . . . . . . . Density . . . . . . . . . . . . . . . . pKa . . . . . . . . . . . . . . . . . .
. . . . . .
. . . . . .
. . . . . .
. . . . . .
. . . . . .
. . . . . .
. . . . . .
. . . . . .
. . . . . .
. . . . . .
. . . . . .
clear, colorless liquid chemical synthesis boiling point, 100 °C miscible 1.22 3.7
SPECIFICATIONS Assay . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≥88.0% HCOOH Maximum Allowable Color (APHA) . . . . . . . . . . . . . . . . . . . . . . . 15 Dilution test. . . . . . . . . . . . . . . . . . . . . . . . Passes test Residue after evaporation . . . . . . . . . . . . . . . 0.002% Acetic acid (CH3COOH) . . . . . . . . . . . . . . . . . 0.4% Ammonium (NH4) . . . . . . . . . . . . . . . . . . . . 0.005% Chloride (Cl) . . . . . . . . . . . . . . . . . . . . . . . 0.001% Sulfate (SO4) . . . . . . . . . . . . . . . . . . . . . . . 0.002% Sulfite (SO3) . . . . . . . . . . . . . . . . . . . . . . . . Passes test
© 2017 American Chemical Society
A
DOI:10.1021/acsreagents.4150 ACS Reagent Chemicals, Part 4
ACS Reagent Chemicals
Monograph
pubs.acs.org/doi/book/10.1021/acsreagents
Heavy metals (as Pb) . . . . . . . . . . . . . . . . . . 5 ppm Iron (Fe) . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ppm
TESTS Assay and other tests are the same as for Formic Acid, 96%, [Part 4: Formic Acid, 96%]. The only variations needed are the sample weights for the sulfate, heavy metals, and iron tests which are listed below.
Sulfate [Part 2: Colorimetry and Turbidimetry; Sulfate; Procedure for Sulfate, Method 3]. Prepare as for Formic Acid 96%, but use 2.5 g sample.
Heavy Metals [Part 2: Colorimetry and Turbidimetry; Heavy Metals (as Lead); Procedure for Heavy Metals, Method 1]. Prepare as for Formic Acid 96%, but use 4.0 g sample.
Iron [Part 2: Colorimetry and Turbidimetry; Iron; Procedure for Iron, Method 1 (Ammonium Thiocyanate)]. Prepare as for Formic Acid 96%, but use 12.0 g sample.
© 2017 American Chemical Society
B
DOI:10.1021/acsreagents.4150 ACS Reagent Chemicals, Part 4
