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| Synonyms:Lithium monobromide Hydrobromic acid lithium salt Lithium bromide anhydrous Lithium bromide solution Molecular Formula:BrLi Molecular Weight: 86.85 HS Code: 2827590000 Grade:solid99% liquid55% Hazard Class:General Cargo | |||||||||
7550-35-8
bosschemical
7550-35-8
Lithium bromide (LiBr) is a white, strongly hygroscopic crystalline lithium salt with one of the highest water affinities of any common salt. It is the standard absorbent of the LiBr–water working pair that powers absorption chillers worldwide, and it doubles as a high-efficiency water-vapor absorbent, a mild Lewis-acid catalyst and a high-purity lithium source for advanced materials.
Lithium bromide spans a unique range of markets — from ton-scale chiller brines in the HVAC industry to gram-scale high-purity material for battery electrolytes, and optical crystals. Its combination of extreme solubility, chemical stability, non-toxicity and zero ODP/GWP makes it one of the most versatile lithium compounds in commerce.
A single salt, four core value propositions:
Absorption Refrigeration:
● the standard absorbent of LiBr–water absorption chillers for HVAC, process cooling and waste-heat recovery;
Energy Storage & Battery Materials:
● a lithium source and electrolyte component for lithium batteries, solid-state electrolytes and lithium-salt synthesis;
Catalysis, Synthesis & Pharmaceuticals:
● a mild Lewis-acid catalyst, synthesis reagent and bromide source
Dehumidification & Specialty Applications:
● a high-efficiency water-vapor absorbent, humidity regulator, desiccant and optical-crystal material.
Item | Specification |
Chemical Name | Lithium bromide (anhydrous) |
Synonyms | Lithium monobromide; Bromolithium; Lithium bromide, anhydrous |
CAS No. | 7550-35-8 |
EC No. (EINECS) | 231-439-8 |
Molecular Formula | LiBr |
Molecular Weight | 86.85 g/mol |
HS Code | 2827.59 (other bromides; 8-digit code may vary by destination) |
Density | 3.46 g/cm³ (solid, 25 °C) |
Melting Point | 552 °C |
Lithium bromide is produced by neutralizing hydrobromic acid with lithium carbonate or hydroxide, followed by purification, concentration and either crystallization (anhydrous powder/beads) or precise dilution to solution strength. Its extreme water solubility — among the highest of any salt — is what enables the concentrated brines used in absorption machines and the clean, concentrated solutions used in research.
Grade selection follows the application. Industrial grade (≥ 99.0%), as powder or 55% solution, serves absorption chillers and dehumidification, with Ca, Mg, Ba, SO₄²⁻, Cl⁻ and Fe controlled to protect equipment.
● Extremely high water affinity: one of the strongest water-vapor absorbers among commercial salts — the basis of absorption cooling and dehumidification.
● Zero environmental impact: ODP = 0 and GWP = 0 working fluid, aligned with green-building and low-carbon cooling requirements.
● Thermally driven, energy-saving: enables chillers powered by waste heat, steam, hot water or solar energy instead of electricity.
● High ionic conductivity: a proven lithium source for electrolytes, lithium-salt synthesis and electrochemical research.
● Mild, selective Lewis acidity: useful catalyst and reagent in organic and pharmaceutical synthesis.
● High refractive index: valued crystalline material for optical and scintillation applications.
● Full traceability: COA with every batch documenting assay, density, impurities and water content.
1 Absorption Refrigeration (Core Application)
Lithium bromide is the absorbent half of the LiBr–water absorption chiller, the dominant thermally driven cooling technology:
● HVAC chillers: water–lithium bromide units for central air conditioning in hotels, data centers and commercial buildings;
● Industrial process cooling: chilled water for chemical, food, textile and pharmaceutical plants;
● Waste-heat recovery: chillers driven by steam, exhaust gas, hot water or solar thermal energy;
● Solution service: 55% w/w solution supplied ready for chiller charging, with corrosion-inhibitor options.
2 Energy Storage & Battery Materials
● Lithium-salt synthesis: starting material for LiTFSI-type and other lithium electrolyte salts and additives;
● Battery electrolytes: lithium bromide as electrolyte component or additive in lithium and lithium–sulfur cells;
● Solid-state and polymer electrolytes: lithium salt component of polymer, composite and ceramic electrolyte systems;
● Electrochemical research: standard salt for lithium-ion conductivity and battery-modeling studies.
3 Catalysis& Synthesis
● Lewis-acid catalyst: promotes selective organic transformations with mild, tunable activity;
● Fine chemicals: lithium/bromide source in organic, inorganic and coordination chemistry.
4 Dehumidification & Specialty Applications
● Water-vapor absorption and humidity regulation: moisture removal in low-humidity environments and HVAC systems;
● Liquid desiccant systems: absorption dehumidifiers for greenhouses, cold stores and specialty drying;
● Hydrogen-chloride removal and drying: scrubs HCl from gas streams and acts as a high-capacity desiccant;
● Optical crystals and advanced materials: high-refractive-index material for optics, scintillation and specialty glass.
Packaging (customizable):
● Industrial: 25 kg fiber drum with PE liner, or 500 kg – 1,000 kg FIBC (powder); 220 kg HDPE drum, 1,000 L IBC or ISO tank (solution);
Storage:
● Keep in a cool, dry, well-ventilated area away from direct sunlight and heat;
● Keep containers tightly closed — lithium bromide is strongly hygroscopic;
● Protect solutions from freezing and from contact with incompatible acids and oxidizers;
● Recommended storage temperature 5 °C – 35 °C.
● Factory-direct supply: own production capacity, transparent pricing, no middleman markup;
● Stable quality: strict internal control, every batch tested, COA with every shipment;
● Export experience: familiar with sea/air shipping documentation for chemical commodities, complete paperwork support;
● Fast response: quotations and technical support (COA, application advice) within 24 hours; small trial orders accepted.
Its dominant use is as the absorbent in lithium bromide–water absorption chillers for air conditioning, industrial process cooling and waste-heat recovery. It is also used for dehumidification, as a mild Lewis-acid catalyst in organic synthesis, as a high-purity lithium source for battery electrolytes and lithium-salt chemistry, and optical applications.
For chiller and dehumidification service, choose industrial grade as 55% solution (ready to charge) or ≥ 99.0% powder (economical to ship and dissolve on site).
It combines extreme water solubility and water-vapor affinity with chemical stability, non-toxicity and zero ODP/GWP — a rare combination for a refrigerant working fluid. Using water as the refrigerant and LiBr as the absorbent lets chillers run on heat rather than electricity, which is why the LiBr–water pair dominates thermally driven cooling worldwide.
