Strontium hydroxide (HCID 87672)

Overview

Strontium dihydroxide is a strontium hydroxide.

Names & identifiers

Preferred name: Strontium hydroxide
IUPAC: strontium dihydroxide
English name: Strontium hydroxide
Molecular formula: H2O2Sr
Molecular weight: 121.63

Names & synonyms

Strontium hydroxide18480-07-4Strontium dihydroxideStrontium hydroxide (Sr(OH)2)EPK818UET5Strontium hydroxide (Sr(OH)2), octahydrateCHEBI:35105STRONTIUM HYDROXIDE ANHYDROUSRefChem:932299DTXCID6079384CHEBI:35153242-367-1

Show more names

Sr(OH)2Strontium dihydoxideStronitium hydroxidestrontiumdihydroxideStrontiuM hydroxide 94%StrontiuM hydroxide,97%STRONTIUM (II) HYDROXIDEStrontiuM hydroxide,95.00%

DTXSID40156893Strontium dihydroxide octahydrateT2B33T08R4strontium;dihydroxideSTRONTIUMHYDROXIDEstrontium(II) hydroxideH2O2SrEINECS 242-367-1

Database identifiers

CAS: 18480-07-4
PubChem CID: 87672
ChEBI: CHEBI:35105
UNII: EPK818UET5
EC Number: 242-367-1
Nikkaji: J44.005A

Properties

Computed structural properties

Topological polar surface area: 2 Å²
Hydrogen bond donors: 2
Hydrogen bond acceptors: 2
Rotatable bonds: 0
Heavy atoms: 3
Formal charge: 0
Complexity: 0

Experimental & physicochemical properties

Chemical ClassesMetals -> Metals, Inorganic Compounds

CosmeticsBuffering

Physical DescriptionOctahydrate: Colorless or white deliquescent solid; [Merck Index] White powder; [Sigma-Aldrich MSDS]

Physicochemical properties

Melting point: 535 °C · 535°C
Boiling point: 710 °C · 710 °C (decomposes)
Density: 3.625 · 3.625
vapor pressure: 0 Pa · 0Pa at 20℃
refractive index: 1.65 · 1.650
form: colorless orthorhombic crystals
color: colorless orthorhombic crystals, crystalline; hygroscopic
PH: 11.27 · 11.27(1 mM solution);12.22(10 mM solution);13.09(100 mM solution)
Odor: Odorless
Water Solubility: 100 g · g/100g solution in H2O: 0.90 (0°C), 2.16 ± 0.41 (25°C), 47.71 (100°C); solid phase, Sr(OH)2 · 8H2O [KRU93]
Merck: 13 · 13,8924
Stability: Stable.
Cosmetics Ingredients Functions: BUFFERING
InChI: 1S/2H2O.Sr/h2*1H2;/q;;+2/p-2
InChIKey: UUCCCPNEFXQJEL-UHFFFAOYSA-L
SMILES: O[Sr]O
CAS DataBase Reference: 18480 · 18480-07-4(CAS DataBase Reference)
EWG's Food Scores: 1 · 1-3
FDA UNII: 818 UET5 · EPK818UET5
NIST Chemistry Reference: Strontium hydroxide(18480-07-4)
EPA Substance Registry System: 2 · Strontium hydroxide (Sr(OH)2) (18480-07-4)
UNSPSC Code: 12352302 · 12352302
NACRES: 23 · NA.23
Symbol(GHS): 5 · GHS05
Signal word: Danger
Hazard statements: 314 · H314
Precautionary statements: 260 · P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363
PPE: 3 · Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
Hazard Codes: C
Risk Statements: 34 · 34
Safety Statements: 26 · 26-27-36/37/39-45
RIDADR: 3262 · UN 3262 8/PG 2
WGK Germany: 3 · 3
RTECS: 9100000 · WK9100000
TSCA: TSCA listed
HazardClass: 8 · 8
PackingGroup: III
HS Code: 28164000 · 28164000
Storage Class: 8 B · 8B - Non-combustible corrosive hazardous materials
Hazard Classifications: 1 Skin · Eye Dam. 1Skin Corr. 1B
REACH Registrations: Active

Safety & regulation

GHS classification

GHS Classification · 4 items

Danger

H302 (38.8%): Harmful if swallowed [Warning Acute toxicity, oral]

P260, P264, P264+P265, P270, P280, P301+P317, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P321, P330, P363, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 232 reports by companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Hazard information

Regulatory Information · 4 items

Chemical: Strontium hydroxide (Sr(OH)2)

Strontium hydroxide (Sr(OH)2) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Strontium hydroxide (Sr(OH)2) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Status: Active Update: 28-02-2023 https://echa.europa.eu/registration-dossier/-/registered-dossier/13438

Strontium hydroxide (Sr(OH)2): Does not have an individual approval but may be used under an appropriate group standard

Other Safety InformationIMAP assessments - Strontium hydroxide (Sr(OH)2): Human health tier I assessment

Hazards SummaryAerosol causes muscle weakness and dyspnea in acute inhalation studies of rats; [RTECS] Causes burns; Inhalation may cause corrosive injuries to upper respiratory tract and lungs; Harmful by ingestion; [Sigma-Aldrich MSDS] See Strontium.

Hazard Classes and CategoriesAcute Tox. 4 (38.8%)

Safety & protection

Protective Action Criteria (PAC) · 3 items

0.89 [mg/m3]

9.8 [mg/m3]

59 [mg/m3]

Toxicology

Adverse EffectsDermatotoxin - Skin burns.

Safety data

PPE: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
wgk: 3
tsca: TSCA listed
rtecs: WK9100000
ridadr: UN 3262 8/PG 2
hs_code: 28164000
risk_code: 34
Signal word: Danger
Symbol(GHS): GHS05
hazard_code: C
safety_code: 26-27-36/37/39-45
hazard_class: 8
Storage Class: 8B - Non-combustible corrosive hazardous materials
packing_group: III
Hazard statements: H314
REACH Registrations: Active
Hazard Classifications: Eye Dam. 1Skin Corr. 1B
Precautionary statements: P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363

Chemistry & industry

Uses & manufacturing

UsesUsed for refining sugar from beets and molasses; [Merck Index]

U.S. Production2020: 44,000 lb

Industry UsesNot Known or Reasonably Ascertainable

Use ClassificationCosmetics -> Buffering

General Manufacturing Information · 2 items

Not Known or Reasonably Ascertainable

Strontium hydroxide (Sr(OH)2): ACTIVE

Applications · 5 items

UsesStrontium hydroxide is used in extracting sugar from beet sugar molasses and in making lubricant soaps and greases.

DescriptionStrontium Hydroxide occurs as an anhydrate whose prismatic, colorless crystals are deliquescent. A monohydrate and octahydrate are also known.Strontium hydroxide is slightly soluble in water but, surprisingly, the octahydrate is much more soluble. It is the latter that is supplied commercially for most applications.When the octahydrate is heated, seven waters of hydration are lost to form the monohydrate and finally the oxide.

UsesExtraction of sugar from beet sugar molasses, lubricant soaps and greases, stabilizer for plastics, glass, adhesives.

UsesStrontium hydroxide [Sr(OH)2] is used to extract sugar from sugar beet molasses. It is also used in the manufacture of soaps, adhesives, plastics, glass, and lubricants that can be used in very high or low temperature environments.

UsesStrontium hydroxide is used chiefly in the refining of beet sugar and as a stabilizer in plastic. It may be used as a source of strontium ions when the Cl- ion is undesirable. Strontium hydroxide absorbs carbon dioxide from the air to form strontium carbonate. This salt is available commercially in sizable quantities.

Preparation methods · 1 item

PreparationPreparation Strontium hydroxide is prepared by treating strontium oxide with water: SrO + H2O → Sr(OH)2 Alternatively, Sr(OH)2 is made by heating strontium carbonate or strontium sulfide with steam at temperatures around 500 to 600°C: SrCO3 + H2O → Sr(OH)2 + CO2 SrS + 2H2O → Sr(OH)2 + H2S.