Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 1,2-naphthoquinone-4-sulfonic acid sodium salt
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

521-24-4

521-24-4 structure

Name: Folin's reagent
Chemical Name: 1,2-naphthoquinone-4-sulfonic acid sodium salt
CAS Number: 521-24-4
Molecular Formula: C₁₀H₅NaO₅S
Molecular Weight: 260.198
Catalog: Organic raw materials Organometallic compound Organic sodium
Create Date: 2018-02-13 08:00:00
Modify Date: 2026-07-13 10:00:05

Name	1,2-naphthoquinone-4-sulfonic acid sodium salt
Synonyms	3,4-Dioxo-3,4-dihydronaphthalene-1-sulfonic acid sodium salt Sodium 1,2-Naphthoquinone-4-sulfonate Sodium 3,4-dioxo-1-naphthalenesulfonate 4-(Sodiooxysulfonyl)-1,2-naphthalenedione EINECS 208-308-9 MFCD00001700 1,2-NAPHTHOQUINONE-4-SULFONIC ACID*SODIU M Naphthoquinone-4-sulfonic acid sodiu 1,2-phthoquinone-4 Sulphonic Acid Sodium salt 1,2-Naphthoquinone-4-sulphonic acid sodium salt 1-Naphthalenesulfonic acid, 3,4-dihydro-3,4-dioxo-, sodium salt (1:1) 1,2-Naphthoquinone-4-sulfonic Acid Sodium Salt sodium 3,4-dioxonaphthalene-1-sulphonate 1,2-Naphthoquinone-4-sulfonic acid sodium salt 3,4-DIHYDRO-3,4-DIOXO-1-NAPHTHALENESULFONIC ACID SODIUM SALT 1,2-NAPTHOQUINONE-4-SULFONIC ACID NA SALT BETA-NAPHTHOQUINONE-4-SULFONIC ACID SODIUM SALT SODIUM B-NAPHTHOQUINONE-4-SULFONATE 1,2-NAPHTHOQUINONE-4-SULFONIC ACID SODIU 3,4-dihydro-3,4-dioxo-1-naphthalene sulfonic acid sodium 1,2Naphthaquinone4SulfonicAcidSod 1,2-Dioxo-1,2-dihydro-4-naphthalenesulfonic acid sodium salt 2,3-Pentanedione sodium,3,4-dioxonaphthalene-1-sulfonate SODIUM-BETA-NAPHTHOQUINONE SULFONATE 1,2-NAPHTHOQUINONE-4-SULPHONIC ACID SODIUM SALT extrapure 1,2-Naphthoquinone-4 Sodium 1,2-Napthoquinone-4-sulfonate 1,2-NAPHTHAQUINONE-4-SULPHONIC ACID SODIUM SALT beta-naphthoquinone-4-sulfonatesodiumsalt Sodium β-naphthoquinone-4-sulfonate Folin's SODIUM 3,4-DIHYDRO-3,4-DIOXO-1-NAPHTHALENESULFONATE SODIUM BETA-NAPHTHOQUINONE-4-SULFONATE Sodium1,2-Naphthoquinone-4-sulfonate> 1,2-Naphthoquinone-4-sulfonic LABOTEST-BB LT00233183 Sodium 3,4-dioxo-3,4-dihydronaphthalene-1-sulfonate 1,2-Naphthoquinone-4-sulfonic acid sodium salt, 3,4-Dihydro-3,4-dioxo-1-naphthalenesulfonic acid sodium salt, Folins 1,2-Naphthaquinone-4-sulfonic acid sodium salt SODIUM 1,2-NAPHTHOQUINONE-4-SULFONATE Sodium 3,4-dioxo-3,4-dihydro-1-naphthalenesulfonate 1,2-NAPHTHOQUINONE-4-SULFONIC ACID, SODI UM SALT 1,2-NAPHTHOQUINONE-4-SULFONIC ACID ALPHA-Naphthoquinone-2-sulfonic acid sodium salt β-Naphthoquinone-4-sulfonic acid sodiuM salt 1,2-NAPHTHOQUINONE-4 SULPHONIC ACID SODIUM SALT MANCHESTER BLUE 1,2-NAPHTHOQUINONE-4-SULFONIC ACID SODIUM SALT ISO 9001：2015 REACH 3,4-dihydro-3,4-dioxo-1-naphthalenesulfonicacisodiumsalt 1,2-Naphthoquinone-4SulphonicAcidSodiumSalt 1,2-Naphthoquinone-4-SulphonicAcid 1-Naphthalenesulfonicacid,3,4-dihydro-3,4-dioxo-,sodiumsalt SODIUM 3,4-DIOXO-3,4-DIHYDRONAPHTHALENE-1-SULFONATE SODIUM 3,4-NAPHTHOQUINONE-1-SULFONATE 3,4-Dihydro-3,4-dioxo-1-naphthalenesulfonic acid sodium salt, Folins , Sodium 1,2-naphthoquinone-4-sulfonate Sodium 3,4-dioxonaphthalene-1-sulfonate

Melting Point	289 °C (dec.)(lit.)
Molecular Formula	C₁₀H₅NaO₅S
Molecular Weight	260.198
Exact Mass	259.975525
PSA	99.72000
LogP	1.41890
Storage condition	2-8°C
Stability	Stable. Incompatible with strong oxidizing agents.
Water Solubility	H2O: 50 mg/mL, clear

CHEMICAL IDENTIFICATION

RTECS NUMBER :: QK1490000

CHEMICAL NAME :: 1-Naphthalenesulfonic acid, 3,4-dihydro-3,4-dioxo-, sodium salt

CAS REGISTRY NUMBER :: 521-24-4

LAST UPDATED :: 199701

DATA ITEMS CITED :: 3

MOLECULAR FORMULA :: C10-H6-O5-S.Na

MOLECULAR WEIGHT :: 261.21

WISWESSER LINE NOTATION :: L66 BVVJ ESWQ &-NA-

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 625 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: AD691-490 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X7927 No. of Facilities: 25 (estimated) No. of Industries: 1 No. of Occupations: 1 No. of Employees: 1358 (estimated) No. of Female Employees: 956 (estimated)

Personal Protective Equipment	dust mask type N95 (US);Eyeshields;Gloves
Hazard Codes	Xi: Irritant;
Risk Phrases	R36/37/38
Safety Phrases	S26
RIDADR	NONH for all modes of transport
WGK Germany	3
RTECS	QK1490000
HS Code	2914399090

Precursor 0
DownStream 10
83-72-7 86614-18-8 86614-20-2 86614-11-1
67-64-1 25107-73-7 26803-18-9 23673-39-4
10148-21-7 17672-02-5

HS Code	2914399090
Summary	2914399090. other aromatic ketones without other oxygen function. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0%

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