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1344-37-2

1344-37-2 structural image
Product Name: Pigment Yellow 34
Formula: PbCrO4+PbSO4
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CHEMICAL AND PHYSICAL PROPERTIES

Physical Description Lead chromate appears as yellow or orange-yellow powder. One of the most insoluble salts. Basic lead chromates are used as pigments. (NTP, 1992)
Color/Form Yellow or orange-yellow powder
Odor Odorless
Boiling Point Decomposes (NTP, 1992)
Melting Point 1551 °F (NTP, 1992)
Solubility less than 1 mg/mL at 66 °F (NTP, 1992)
Density 6.12 at 59 °F (NTP, 1992) - Denser than water; will sink
Vapor Pressure Approximately 0 mm Hg
Stability/Shelf Life Stable under recommended storage conditions.
Decomposition When heated to decomposition it emits toxic fumes of /inorganic lead/
pH Bivalent chromium compounds are basic
Refractive Index Index of refraction: 2.31, 2.37 (Li /lamp/), 2.66
Other Experimental Properties Lead chromate displays colors that indicate its trimorphism. The stable form is monoclinic and has an orange-yellow color. An unstable tetragonal orange-red form is isomorphous with, and stabilized by, PbMoO4. A second unstable yellow form is rthorhombic, isomorphous with and stabilized by PbSO4. The diversity shown by the lead salt is the key to its versatility as a pigment.
Chemical Classes Metals -> Lead Compounds, Inorganic

COMPUTED DESCRIPTORS

Molecular Weight 323 g/mol
Hydrogen Bond Donor Count 0
Hydrogen Bond Acceptor Count 4
Rotatable Bond Count 0
Exact Mass 323.89682 g/mol
Monoisotopic Mass 323.89682 g/mol
Topological Polar Surface Area 80.3 Ų
Heavy Atom Count 6
Formal Charge 0
Complexity 62.2
Isotope Atom Count 0
Defined Atom Stereocenter Count 0
Undefined Atom Stereocenter Count 0
Defined Bond Stereocenter Count 0
Undefined Bond Stereocenter Count 0
Covalently-Bonded Unit Count 2
Compound Is Canonicalized Yes

PRODUCT INTRODUCTION

description

Lead chromate appears as yellow or orange-yellow powder. One of the most insoluble salts. Basic lead chromates are used as pigments. (NTP, 1992)

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