7789-01-7

• 常用中文名：铬酸锂,二水合物
• 常用英文名：Lithium chromate
• CAS号：7789-01-7
• 分子式：CrLi₂O₄
• 分子量：129.876
• 发布时间：2018-07-06 10:22:11
• 更新时间：2024-01-04 07:26:05

• 纺织工业中用作冷冻剂。

名称

• 中文名: 铬酸锂
• 英文名: Lithium chromate hydrate
• 中文别名: 铬酸锂,二水合物
• 英文别名: dilithium,dioxido(dioxo)chromium,dihydrate; Lithium chromate; Chromium, diolatodioxo-, lithium salt (1:2); Dilithium dioxido(dioxo)chromium

物化性质

• 密度: 1.355
• 分子式: CrLi₂O₄
• 分子量: 129.876
• 精确质量: 129.952179
• PSA: 80.26000
• 外观性状: 黄色斜方晶系的晶体,吸湿的
• 储存条件: 室温，密封
• 稳定性:

  Na2CrO4·10H2O为易吸潮的黄色单斜晶体，在195℃失去四个水形成六水合物，在20℃时，形成四水合物。相对密度1.483，熔点19.92℃。在冷水中溶解度50g/100mL（10℃），在热水中溶解度126g/100mL（100℃），微溶于乙醇，不溶于冰醋酸。

• 水溶解性: 94.6 G/L (25 ºC)
• 分子结构:

  1、摩尔折射率：无可用的

  2、摩尔体积（cm³/mol）：无可用的

  3、等张比容（90.2K）：无可用的

  4、表面张力（dyne/cm）：无可用的

  5、介电常数：无可用的

  6、极化率（10^-24cm³）：无可用的

  7、单一同位素质量：129.952178 Da

  8、标称质量：130 Da

  9、平均质量：129.8757 Da

• 更多:

  1. 性状：温度保持在26℃以上为稳定黄色单斜针状晶体。

  2. 密度（g/mL 25ºC）：1.483

  3. 相对蒸汽密度（g/mL,空气=1）：未确定

  4. 熔点（ºC）：62.8

  5. 沸点（ºC，常压）：未确定

  6. 沸点（ºC,5.2kPa）：未确定

  7. 折射率（n20/D）：未确定

  8. 闪点（ºC，）：未确定

  9. 比旋光度（º）：未确定

  10. 自燃点或引燃温度（ºC）：未确定

  11. 蒸气压（kPa,25ºC）：未确定

  12. 饱和蒸气压（kPa,60ºC）：未确定

  13. 燃烧热（KJ/mol）：未确定

  14. 临界温度（ºC）：未确定

  15. 临界压力（KPa）：未确定

  16. 油水（辛醇/水）分配系数的对数值（25℃）：未确定

  17. 爆炸上限（%,V/V）：未确定

  18. 爆炸下限（%,V/V）：未确定

  19. 溶解性(mg/mL)：未确定

MSDS

Version 1.6 Regulation (EC) No 1907/2006 1 - Product and Company Information Product NameLITHIUM CHROMATE HYDRATE, TECHNICAL GRADE 2 - Hazards Identification SPECIAL INDICATION OF HAZARDS TO HUMANS AND THE ENVIRONMENT May cause cancer. May cause heritable genetic damage. Contact with combustible material may cause fire. Irritating to eyes, respiratory system and skin. 3 - Composition/Information on Ingredients Product NameCAS #EC noAnnex I Index Number LITHIUM CHROMATE HYDRATENoneNoneNone FormulaLi2CrO4 · xH2O Molecular Weight 129,8800 AMU 4 - First Aid Measures AFTER INHALATION If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen. AFTER EYE CONTACT Assure adequate flushing of the eyes by separating the eyelids with fingers. AFTER INGESTION If swallowed, wash out mouth with water provided person is conscious. Call a physician. 5 - Fire Fighting Measures EXTINGUISHING MEDIA Suitable: Noncombustible. Use extinguishing media appropriate to surrounding fire conditions. ALDRICHwww.molbase.com SPECIAL RISKS Specific Hazard(s): Contact with other material may cause fire. Emits toxic fumes under fire conditions. SPECIAL PROTECTIVE EQUIPMENT FOR FIREFIGHTERS For fires involving this material, do not enter any enclosed or confined fire space without proper protective equipment. This may include self-contained breathing apparatus to protect against the hazardous effects of the normal products of combustion or oxygen deficiency 6 - Accidental Release Measures PROCEDURE(S) OF PERSONAL PRECAUTION(S) Wear self-contained breathing apparatus, rubber boots, and heavy rubber gloves. METHODS FOR CLEANING UP Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete. 7 - Handling and Storage HANDLING Directions for Safe Handling: Do not breathe dust. Do not get in eyes, on skin, on clothing. Do not use if skin is cut or scratched. Wash thoroughly after handling. STORAGE Conditions of Storage: Keep tightly closed. Keep away from combustible materials, heat, sparks, and open flame. Store in a cool dry place. 8 - Exposure Controls / Personal Protection ENGINEERING CONTROLS Use only in a chemical fume hood. Safety shower and eye bath. GENERAL HYGIENE MEASURES Wash contaminated clothing before reuse. Discard contaminated shoes. PERSONAL PROTECTIVE EQUIPMENT Special Protective Measures: Wear appropriate government approved respirator, chemical-resistant gloves, safety goggles, other protective clothing. Faceshield (8-inch minimum). 9 - Physical and Chemical Properties pH N/A BP/BP RangeN/A MP/MP RangeN/A Flash PointN/A FlammabilityN/A Autoignition TempN/A Oxidizing Properties N/A Explosive Properties N/A Explosion LimitsN/A ALDRICHwww.molbase.com Vapor PressureN/A Partition Coefficient N/A ViscosityN/A Vapor DensityN/A Saturated Vapor Conc. N/A Evaporation RateN/A Bulk DensityN/A Decomposition Temp.N/A Solvent ContentN/A Water ContentN/A Surface TensionN/A ConductivityN/A Miscellaneous DataN/A SolubilityN/A 10 - Stability and Reactivity STABILITY Materials to Avoid: Reducing agents, Organic materials Avoid contact with acid. HAZARDOUS DECOMPOSITION PRODUCTS Hazardous Decomposition Products: Nature of decomposition products not known. 11 - Toxicological Information SENSITIZATION Sensitization: May cause allergic respiratory and skin reactions SIGNS AND SYMPTOMS OF EXPOSURE Large doses of lithium ion have caused dizziness and prostration, and can cause kidney damage if sodium intake is limited. Dehydration, weight loss, dermatological effects, and thyroid disturbances have been reported. Central nervous system effects that include slurred speech, blurred vision, sensory loss, ataxia, and convulsions may occur. Diarrhea, vomiting, and neuromuscular effects such as tremor, clonus, and hyperactive reflexes may occur as a result of repeated exposure to lithium ion. Inhalation of dichromate dusts can cause ulceration and perforation of the nasal septum. Contact with breaks in the skin can cause ulceration (chrome sores). Other symptoms of exposure include erosion and discoloration of the teeth, nephritis, epigastric pain (inflammation and ulceration of the gastrointestinal tract). Anemia. Stomach pains, vomiting, diarrhea. Exposure can cause: ROUTE OF EXPOSURE Inhalation: Material is irritating to mucous membranes and upper respiratory tract. Multiple Routes: Causes eye and skin irritation. May be fatal if inhaled, swallowed, or absorbed through skin. TARGET ORGAN INFORMATION Kidneys. Lungs. Central nervous system. Blood. CHRONIC EXPOSURE - CARCINOGEN Result: Carcinogen. 12 - Ecological Information ALDRICHwww.molbase.com No data available. 13 - Disposal Considerations SUBSTANCE DISPOSAL Cautiously acidify a 3% solution or a suspension of the material to pH 2 with sulfuric acid. Gradually add a 50% excess of aqueous sodium bisulfite with stirring at room temperature. An increase in temperature indicates that a reaction is taking place. If no reaction is observed on the addition of about 10% of the sodium bisulfite solution initiate it by cautiously adding more acid. If manganese, chromium, or molybdenum are present adjust the pH of the solution to 7 and treat with sulfide to precipitate for burial as hazardous waste. Destroy excess sulfide, neutralize, and flush the solution down the drain. Observe all federal, state, and local environmental regulations. 14 - Transport Information RID/ADR UN#: 1479 Class: 5.1 PG: III Proper Shipping Name: Oxidizing solid, n.o.s. IMDG UN#: 1479 Class: 5.1 PG: III Proper Shipping Name: Oxidizing solid, n.o.s. Marine Pollutant: No Severe Marine Pollutant: No Technical Name: Required IATA UN#: 1479 Class: 5.1 PG: III Proper Shipping Name: Oxidizing solid, n.o.s. Inhalation Packing Group I: No Technical Name: Required 15 - Regulatory Information CLASSIFICATION AND LABELING ACCORDING TO EU DIRECTIVES INDICATION OF DANGER: O-T+ Oxidizing. Very toxic. R-PHRASES: 45-46-8-36/37/38 May cause cancer. May cause heritable genetic damage. Contact with combustible material may cause fire. Irritating to eyes, respiratory system and skin. S-PHRASES: 53-17-36/37/39-45 Avoid exposure - obtain special instructions before use. Keep away from combustible material. Wear suitable protective clothing, gloves, and eye/face protection. In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible). Caution: Substance not yet fully tested (EU). ALDRICHwww.molbase.com COUNTRY SPECIFIC INFORMATION Germany WGK: 3 Self-Classification 16 - Other Information WARRANTY The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. Inc., shall not be held liable for any damage resulting from handling or from contact with the above product. See reverse side of invoice or packing slip for additional terms and conditions of sale. Copyright 2010 Co. License granted to make unlimitedpaper copies for internal use only. DISCLAIMER For R&D use only. Not for drug, household or other uses. ALDRICHwww.molbase.com SECTION 16 - ADDITIONAL INFORMATION N/A

安全

• 危害码 (欧洲): O: Oxidizing agent;T+: Very toxic;
• 风险声明 (欧洲): R45;R46;R8;R36/37/38
• 安全声明 (欧洲): 53-17-36/37/39-45
• 危险品运输编码: UN 1479 5.1/PG 3
• WGK德国: 3
• RTECS号: CZ1790000
• 包装等级: III
• 危险类别: 3.2
• 海关编码: 29036990

制备

1.一水氢氧化锂和无水氧化铬CrO3混合加热可获得9985%的Li2CrO4·2H2O。在结晶前应除去溶液中微量三价铬和不溶物，用次氯酸钠氧化溶液并过滤，最终产物是淡黄色晶体。它在甲醇中的溶解度如下：

t/℃0.7 7.2 10.4 20.0 29.8 40.2 50.1 60.0 70.0溶解度/%(w)47.27 47.74 47.89 48.60 49.62 50.66 52.10 53.52 55.27相对密度2.149(d254)。铬酸钠的固体晶格或水溶液都含有CrO2-4四面体阴离子。为黄色晶体，是重要工业原料。

工业上制备铬酸钠是先煅烧铬铁矿和苏打灰与石灰混合物，然后用水浸取。

2.实验室制法称取6g铬铁矿粉与4g硝酸钠均匀混合。另称取4.5g氢氧化钠及4.5g碳酸钠于铁坩埚中，混合后用小火加热至沸腾，然后将溶液倾入烧杯内，再加水，加热，如此反复2～3次，即可全部取出熔块。将烧杯中的溶液及熔块一同加热煮沸15min，并不断搅拌以加速溶解。稍冷后抽滤，滤渣用10mL水洗涤一次。用冰醋酸调节滤液至pH值为7～8，使氢氧化铝沉淀，加热数min，过滤，沉淀弃去。滤液移入蒸发皿中，蒸发浓缩，得到黄色结晶。

水合铬酸钠有四水合物和十水合物两种。

海关

海关编码	29036990