4,4'-Diamino-2,2'-stilbenedisulfonic acid

FLAVONIC ACID(81-11-8) is reported in EPA TSCA Inventory.

The IUPAC name of Flavonic acid is 5-amino-2-[(E)-2-(4-amino-2-sulfophenyl)ethenyl]benzenesulfonic acid. With the CAS registry number 81-11-8, it is also named as 4,4'-Diamino-2,2'-stilbenedisulfonic acid. The product's categories are intermediates of dyes and pigments; stilbenes; fluorescent labels & indicators. It is light yellow powder which is very slightly soluble in water, soluble in alcohol and ether, and easily soluble in alkaline solution. In addition, this chemical is stable, combustible and incompatible with iron, strong oxidizing agents. Furthermore, it should be sealed in the container and stored in the cool and dry place.

The other characteristics of this product can be summarized as: (1)ACD/LogP: -1.72; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): -6.14; (4)ACD/LogD (pH 7.4): -6.21; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 8; (10)#H bond donors: 6; (11)#Freely Rotating Bonds: 6; (12)Index of Refraction: 1.726; (13)Molar Refractivity: 88.56 cm³; (14)Molar Volume: 222.7 cm³; (15)Polarizability: 35.11×10^-24 cm³; (16)Surface Tension: 92.5 dyne/cm; (17)Rotatable Bond Count: 4; (18)Tautomer Count: 2; (19)Exact Mass: 370.029328; (20)MonoIsotopic Mass: 370.029328; (21)Topological Polar Surface Area: 178; (22)Heavy Atom Count: 24; (23)Complexity: 606.

Preparation of Flavonic acid: It can be ontained by the following methods:





this product

Uses of Flavonic acid: It is used in the production of fluorescent whitening agent, ChrysophenineG, and Direct Yellow R. And it is also used as insecticide.

When you are using this chemical, please be cautious about it as the following:
It is harmful if swallowed, so people should not breathe dust and avoid contact with skin and eyes. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If you want to contact this product, you must wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 

People can use the following data to convert to the molecule structure.
1. SMILES:O=S(=O)(O)c1c(ccc(N)c1)\C=C\c2ccc(N)cc2S(=O)(=O)O
2. InChI:InChI=1/C14H14N2O6S2/c15-11-5-3-9(13(7-11)23(17,18)19)1-2-10-4-6-12(16)8-14(10)24(20,21)22/h1-8H,15-16H2,(H,17,18,19)(H,20,21,22)/b2-1+

The following are the toxicity data which has been tested.

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
guinea pig	LD50	oral	47gm/kg (47000mg/kg)	LIVER: LIVER FUNCTION TESTS IMPAIRED KIDNEY, URETER, AND BLADDER: RENAL FUNCTION TESTS DEPRESSED	Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 45(3), Pg. 73, 1980.