129-96-4

Basic information

• Product Name: CHROMOTROPIC ACID DISODIUM SALT
• Synonyms: Disodium chromotropicate;chromogen c;disodium 4,5-dihydroxy-2,7-naphthalene sulfonate;1,8-Dihydroxy-3,6-naphthalenedisulfonic acid disodium salt;Disidium4,4'-Bis(2-sulfonatostyryl)biphenyl;Disodium 1,8-dihydroxylnaphthalene-3,6-disulfonate;Disodium naphthalene 1,8-dihydroxy-3,6-disulfonate;Disodium-1,8-dihydroxynaphthalene-3,6-disulfonate
• CAS NO: 129-96-4
• Molecular Formula: C₁₀H₆O₈S₂*2Na
• Molecular Weight: 320.29572
• EINECS: 204-972-9
• Product Categories: Intermediates of Dyes and Pigments
• Mol File: 129-96-4.mol

Chemical Properties

• Melting Point: >300 °C(lit.)
• Boiling Point: °Cat760mmHg
• Flash Point: °C
• Appearance: off-white/
• Density: g/cm³
• CAS DataBase Reference: CHROMOTROPIC ACID DISODIUM SALT(CAS DataBase Reference)
• NIST Chemistry Reference: CHROMOTROPIC ACID DISODIUM SALT(129-96-4)
• EPA Substance Registry System: CHROMOTROPIC ACID DISODIUM SALT(129-96-4)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36
• WGK Germany: 3
• Hazardous Substances Data: 129-96-4(Hazardous Substances Data)

Usage

Uses

Used in Analytical Chemistry:
CHROMOTROPIC ACID DISODIUM SALT is used as an indicator in complexometric titrations for the determination of metals due to its high selectivity and sensitivity to different metal ions.
Used in Organic Synthesis:
CHROMOTROPIC ACID DISODIUM SALT is used as a reagent in the synthesis of various organic compounds, contributing to the development of new chemical entities.
Used in Research and Analysis:
CHROMOTROPIC ACID DISODIUM SALT is used in the preparation of reagents for research and analysis purposes, aiding in the study and understanding of various chemical processes and reactions.
Used in Preparation of Reagents:
CHROMOTROPIC ACID DISODIUM SALT is used as a component in the preparation of reagents for analysis and research, enhancing the capabilities of analytical techniques and methodologies.

InChI:InChI=1/C10H8O8S2.2Na/c11-8-3-6(19(13,14)15)1-5-2-7(20(16,17)18)4-9(12)10(5)8;;/h1-4,11-12H,(H,13,14,15)(H,16,17,18);;/q;2*+1/p-2

Downstream Products

• 1914-99-4 chlorophosphonazo III 
• 49598-85-8 scytalone 
• 321922-71-8 4,5-ditosyloxynaphthalene-2,7-disulfonyl chloride 
• 49598-85-8 3,6,8-Trihydroxy-3,4-dihydronaphthalen-1(2H)-one 
• 18512-30-6 1,3,6,8-Tetrahydroxynaphthalene 

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The invention discloses a device for preparing H-acid, comprising a sulfonating device, a nitrating device, a denitration device, an extraction device, a reduction device, a concentration device, a dilution device, a separation and filter device and a drying device. An outlet of the sulfonating device is connected with an inlet of the nitrating device, an outlet of the nitrating device is connected with an inlet of the denitration device, an outlet of the denitration device is connected with an inlet of the extraction device, a first outlet of the extraction device is connected with an inlet of the reduction device, an outlet of the reduction device is connected with an inlet of the concentration device, an outlet of the concentration device is connected with an inlet of the dilution device, an outlet of the dilution device is connected with a first inlet of the separation and filter device, an outlet of the separation and filter device is connected with an inlet of the drying device, and a second outlet of the extraction device is connected with a second inlet of the separation and filter device. The device for preparing H-acid produces H-acid with a continuous production method, has the high production efficiency, saves materials and reduces economic cost.