Skip to Content
MilliporeSigma
All Photos(1)

Key Documents

8.40104

Sigma-Aldrich

1,5-Naphthalenedisulfonic acid

for synthesis

Synonym(s):

1,5-Naphthalenedisulfonic acid, Armstrong acid

Sign Into View Organizational & Contract Pricing
All Photos(1)

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)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service