Sodium lignosulfonate (lignosulfonic acid, sodium salt) is used in the food industry as a de-foaming agent for paper production and in adhesives for items that come in contact with food. It has preservative properties, and is used as an ingredient in animal feeds. It is also used for construction, ceramics, mineral powder, chemical industry, textile industry (leather), metallurgical industry, petroleum industry, fire-retardant materials, rubber vulcanization, organic polymerization.^[1]

Quick Facts Identifiers, Properties ...

Sodium lignosulfonate

Identifiers
CAS Number	sample: 8061-51-6 Y
3D model (JSmol)	sample: Interactive image
ChemSpider	sample: 78432514
ECHA InfoCard	100.111.815
EC Number	sample: 617-124-1
PubChem CID	sample: 25113562
UNII	sample: XY2KOA860T Y
CompTox Dashboard (EPA)	sample: DTXSID5025499
InChI InChI=1S/C20H26O10S2.2Na/c1-28-18-7-3-6-15(20(18)21)12-16(13-32(25,26)27)30-17-9-8-14(11-19(17)29-2)5-4-10-31(22,23)24;;/h3,6-9,11,16,21H,4-5,10,12-13H2,1-2H3,(H,22,23,24)(H,25,26,27);;/q;2*+1/p-2/t16-;;/m1../s1 Key: YDEXUEFDPVHGHE-GGMCWBHBSA-L
SMILES sample: COC1=CC=CC(=C1O)C[C@H](CS(=O)(=O)[O-])OC2=C(C=C(C=C2)CCCS(=O)(=O)[O-])OC.[Na+].[Na+]
Properties
Chemical formula	Variable
Appearance	Brown powder[1]
Density	~ 0.5 g/cm3[1]
Melting point	Decomposes
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H319
Precautionary statements	P264, P280, P305+P351+P338, P337+P313
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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It is a pepsin inhibitor. Vovac, J.A. et al., Arch. Int. Pharmacodyn. Ther., 1969, 177, 150 (pharmacol) Alphin, R.S. et al., Experientia, 1972,28, 53 (pharmacol)

Sodium lignosulfonate is also known by the following names.