Common Name	Sodium stearate
CAS Number	822-16-2
Molecular Weight	306.459
Density	1.103 g/cm3
Boiling Point	359.4ºC at 760 mmHg
Molecular Formula	C18H35NaO2
Melting Point	245 - 255ºC
MSDS	Chinese USA
Flash Point	162.4ºC

Density	1.103 g/cm3
Boiling Point	359.4ºC at 760 mmHg
Melting Point	245 - 255ºC
Molecular Formula	C18H35NaO2
Molecular Weight	306.459
Flash Point	162.4ºC
Exact Mass	306.253479
PSA	40.13000
LogP	4.99780
Storage condition	2-8°C
Stability	Stable. Incompatible with strong oxidizing agents.
Water Solubility	SOLUBLE IN COLD AND HOT WATER

CHEMICAL IDENTIFICATION
RTECS NUMBER :
WI4725000
CHEMICAL NAME :
Stearic acid, sodium salt
CAS REGISTRY NUMBER :
822-16-2
LAST UPDATED :
199712
DATA ITEMS CITED :
8
MOLECULAR FORMULA :
C18-H35-O2.Na
MOLECULAR WEIGHT :
306.52
WISWESSER LINE NOTATION :
QV17 &-NA-
HEALTH HAZARD DATA
ACUTE TOXICITY DATA
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Unreported
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
400 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
ATMPA2 Annals of Tropical Medicine and Parasitology. (Grune & Stratton, Inc., POB 6280, Duluth, MN 55806) V.1- 1907- Volume(issue)/page/year: 32,177,1938
TYPE OF TEST :
LDLo - Lowest published lethal dose
ROUTE OF EXPOSURE :
Intravenous
SPECIES OBSERVED :
Mammal - dog
DOSE/DURATION :
10 mg/kg
TOXIC EFFECTS :
Vascular - thrombosis distant from injection site
REFERENCE :
JCINAO Journal of Clinical Investigation. (Rockefeller Univ. Press, 1230 York Ave., New York, NY 10021) V.1- 1924- Volume(issue)/page/year: 42,860,1963 *** REVIEWS *** ACGIH TLV-Not classifiable as a human carcinogen DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 ACGIH TLV-TWA 10 mg/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 69445 No. of Facilities: 8011 (estimated) No. of Industries: 75 No. of Occupations: 89 No. of Employees: 98215 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 69445 No. of Facilities: 6021 (estimated) No. of Industries: 60 No. of Occupations: 54 No. of Employees: 98046 (estimated) No. of Female Employees: 35115 (estimated)

Personal Protective Equipment	Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter
Hazard Codes	Xn
Safety Phrases	S24/25
RIDADR	UN 3077 9/PG 3
WGK Germany	1
RTECS	WI4725000
HS Code	2915709000

N/A

1.What is Sodium Stearate?

Sodium stearate is the ester of sodium and stearic acid -- basically a specialized form of a very hard soap that doesn't lather much and can be used as a stabilizer or to increase viscosity or hardness of a product. (For instance in an emulsion, it can be used as a co-emulsifier and thickener.) It typically comes in flake or pastille form.

2.Is Sodium Stearate Natural?

Sodium stearate occurs naturally in most soap bars. It's derived from stearic acid which is found in most saturated (solid) fats like coconut oil, palm oil, and tallow. To make sodium stearate, the fatty acids in the oil are separated (usually under high pressure, heat, and a centrifuge) and the stearic acid is isolated. Then, through the process of hydrolysis, the glycerol group (aka glycerin) separated from the fatty acid chains, which then bind with a sodium ion to create sodium stearate.

3.Is Sodium Stearate Toxic?

Sodium stearate is generally recognized as non-toxic. Ingesting large amounts could cause digestive upset, or inhaling it in powder form could case respiratory irritation. However, as used in most products, it's generally non-toxic. It's not a known reproductive toxin (endocrine disruptor) and not a known carcinogen.

4.Is Sodium Stearate A Skin Irritant?

Sodium stearate is generally well-tolerated by skin and not a common allergen or irritant. (Source) However, if you're using a deodorant with sodium stearate and are experiencing underarm irritation, it may be a contributing factor. Skin-to-skin friction is the top cause for underarm rashes (a condition called intertrigo) and the waxy nature of sodium stearate could be increasing that friction. (Especially if the formula feels tacky, gritty, or sticky.) Another cause for underarm rashes is heat rash, when perspiration gets trapped in the skin and bumps/blisters start to form. It's possible that sodium stearate may be trapping moisture in your skin more than it normally would. For more information on underarm rashes, visit this page.