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Key Documents

8.40104

Sigma-Aldrich

1,5-Naphthalenedisulfonic acid

for synthesis

Synonym(s):

1,5-Naphthalenedisulfonic acid, Armstrong acid

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About This Item

Empirical Formula (Hill Notation):
C10H8O6S2
CAS Number:
81-04-9
Molecular Weight:
288.30
UNSPSC Code:
12352106
EC Index Number:
201-317-9
NACRES:
NA.22

vapor pressure

51 hPa ( 50 °C)

Quality Level

200

Assay

≥97.0% (HPLC)

potency

2420 mg/kg LD50, oral (Rat)

pH

2.4 (20 °C, 1 g/L in H2O)

mp

110 °C (decomposes)

solubility

1030 g/L

bulk density

900 kg/m3

storage temp.

2-30°C

InChI

1S/C10H8O6S2/c11-17(12,13)9-5-1-3-7-8(9)4-2-6-10(7)18(14,15)16/h1-6H,(H,11,12,13)(H,14,15,16)

InChI key

XTEGVFVZDVNBPF-UHFFFAOYSA-N

Analysis Note

Assay (HPLC, area%): ≥ 97.0 % (a/a)
Water (K. F.): 22.0 - 26.0 %
Identity (IR): passes test

Pictograms

Corrosion
GHS05

Signal Word

Danger

Hazard Statements

H290 - H314

Hazard Classifications

Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B

Storage Class Code

8A - Combustible, corrosive hazardous materials

WGK

WGK 3

Certificates of Analysis (COA)

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