H Acid

H Acid - Names and Identifiers

Name	4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid
Synonyms	H Acid H-Acid c.i.35570 C.I. 35570 1-Naphthol-8-amino-3,6-disulfonicacid 1-AMINO-8-NAPHTHOL-3,6-DISULFONIC ACID 1-Naphthol-8-amino-3,6-disulfonic acid kyselina1-amino-8-naftol-3,6-disulfonova 4-amino-5-hydroxy-7-naphthalenedisulfonicacid 4-AMINO-5-HYDROXY-2,7-NAPTHALENEDISULFONIC ACID 7-Naphthalenedisulfonicacid,4-amino-5-hydroxy-2 4-AMINO-5-HYDROXY-2,7-NAPHTHALENEDISULFONIC ACID 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid 1-Amino-8-Hydroxynaphthalene-3,6-Disulphonic Acid
CAS	90-20-0
EINECS	201-975-7
InChI	InChI=1/C10H9NO7S2/c11-8-3-6(19(13,14)15)1-5-2-7(20(16,17)18)4-9(12)10(5)8/h1-4,12H,11H2,(H,13,14,15)(H,16,17,18)

H Acid - Physico-chemical Properties

Molecular Formula	C10H9NO7S2
Molar Mass	319.31
Density	1.6832 (rough estimate)
Melting Point	>300°C(lit.)
pKa	-0.95±0.40(Predicted)
Storage Condition	Room Temprature
Refractive Index	1.7640 (estimate)
Physical and Chemical Properties	Pure product is colorless crystals, slightly soluble in cold water, soluble in alkali and alkali solution such as caustic soda. And ferric chloride solution was brown red. The acid salt has red fluorescence with microstrip blue, and changes to red-purple color after adding alkali.
Use	It is an important intermediate for the manufacture of azo dyes.

H Acid - Risk and Safety

Hazard Symbols	Xi - Irritant
Risk Codes	36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing.
WGK Germany	3

H Acid - Reference Information

EPA chemical substance information	information provided by: ofmpeb.epa.gov (external link)
Application	is an important intermediate in the manufacture of azo dyes
category	toxic substances
toxicity grade	low toxicity
Acute toxicity	Reference range: oral-rat LD50: 6210 mg/kg
stimulation data	eyes-rabbits 500 mg/24 h mild
flammability hazard characteristics	flammability; Toxic nitrogen oxide and sulfur oxide fumes from combustion
storage and transportation characteristics	warehouse ventilation and low temperature drying
extinguishing agent	dry powder, foam, sand, carbon dioxide, water mist

Last Update：2024-04-10 22:29:15

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View History

H Acid
CML-039
Protectol KLC 80
Methyltripropylammonium chloride

H Acid

4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid

CAS: 90-20-0

Molecular Formula: C10H9NO7S2

H Acid - Names and Identifiers

H Acid - Physico-chemical Properties

H Acid - Risk and Safety

H Acid - Reference Information

Supplier List

H Acid Request for Quotation

4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid

CAS: 90-20-0

Molecular Formula: C10H9NO7S2

H Acid - Names and Identifiers

H Acid - Physico-chemical Properties

H Acid - Risk and Safety

H Acid - Reference Information

Supplier List

H Acid