基本情報
- 標準SMILES
O.O.[Na+].[Na+].[O]=[Cr](=[O])([O-])[O][Cr](=[O])(=[O])[O-]- InChIKey
JYDRNIYTFCBIFC-UHFFFAOYSA-N- 分子式
- Cr2H4Na2O9
- 平均分子量
- 298 g/mol
- 単同位体質量
- 297.84608527
名称と識別子
- 優先名称
- Sodium dichromate dihydrate
- IUPAC
- disodium;oxido-(oxido(dioxo)chromio)oxy-dioxochromium;dihydrate
- 現地名
- 重クロム酸ナトリウム
- 英語名
- Sodium dichromate dihydrate
- 分子式
- Cr2H5NaO8
- 分子量
- 260.01
名称と別名
Sodium dichromate dihydrate7789-12-0Disodium dichromate dihydrateDTXSID603206152125XYY2AChromic acid (H2Cr2O7), disodium salt, dihydrateDICHROMIC ACID (H2Cr2O7), DISODIUM SALT, DIHYDRATEDTXCID4012061RefChem:1098784CCRIS 6344UNII-52125XYY2ANCGC00091922-02
名称をさらに表示
二クロム酸ナトリウム2水和物重クロム酸·2ナトリウム·2水和物重クロム酸ニナトリウムニ水和物ジクロム酸ナトリウム2水和物二クロム酸ナトリウム二水和物重クロム酸ナトリウム二水和物二クロム酸二ナトリウム二水和物重クロム酸ナトリウム2水和物ヘプタオキシド二クロム酸ナトリウム水和物二クロム酸ナトリウム二水和物 (重クロム酸ナトリウム二水和物)重クロム酸ナトリウム二水和物二クロム酸ナトリウム二水和物 ACS REAGENT,≥99.5%二クロム酸ナトリウム二水和物 PURISS. P.A.,ACS REAGENT,≥99.5% (RT)重クロム酸ナトリウム二クロム酸ナトリウムニ水和物重クロム酸・2ナトリウム・2水和物二クロム酸ナトリウムSODIUM DICHROMATESODIUM BICHROMATESODIUM DICHROMATE GRSodium dichromate diSodium Dichromate ARSODIUM DICHROMATE 2H2OSODIUM DICHROMATE, ACSSodiumbichromateanhydrousSODIUM DICHROMATE, HYDROUSSODIUM DICHROMATE 2HYD XTL
disodium;oxido-(oxido(dioxo)chromio)oxy-dioxochromium;dihydrateEC 234-190-3Sodium dichromate dihydrate (VI)CAS-7789-12-0sodium dichromate-dihydrateSCHEMBL867453sodium dichromate (VI) dihydrateTox21_111178
データベース識別子
- CAS
7789-12-0- PubChem CID
- 108005
- DTXSID
DTXSID6032061- UNII
- 52125XYY2A
- EC Number
- 616-541-6
物性
構造計算による物性
- 極性表面積
- 126 Ų
- 水素結合供与体数
- 2
- 水素結合受容体数
- 9
- 回転可能結合数
- 0
- 重原子数
- 13
- 形式電荷
- 0
- 複雑度
- 194
実験および物理化学的性質
Chemical ClassesMetals -> Chromium Compounds, Inorganic
Density2.35 @ 13°C
Physical DescriptionReddish to bright orange solid; Somewhat deliquescent and soluble in water; [Merck Index] Orange-red odorless crystals; Hygroscopic and soluble in water; [Alfa Aesar MSDS]
物理化学的性質
- 融点
- 91 °C · 91 °C(lit.)
- 沸点
- 400 °C · 400°C
- 比重(密度)
- 2 · 2,348 g/cm3
- 蒸気密度
- 10 · 10 (vs air)
- 貯蔵温度
- 5 °C · Store at +5°C to +30°C.
- 溶解性
- メタノール（わずかに、超音波処理）
- 外見
- 個体
- 比重
- 2.348 · 2.348
- 色
- 赤いオレンジ
- 臭い (Odor)
- 無臭
- PH
- 3.5 · 3.5 (20°C, 100g/L)
- 水溶解度
- 730 g/L · 730g/L(20℃)
- Merck
- 14 · 14,8609
- Dielectric constant
- 2.9 · 2.9(Ambient)
- InChI
- 1S/2Cr.2Na.2H2O.7O/h;;;;2*1H2;;;;;;;/q;;2*+1;;;;;;;;2*-1
- InChIKey
- JYDRNIYTFCBIFC-UHFFFAOYSA-N
- SMILES
- O.O.[Na+].[Na+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O
- CAS データベース
- 7789 · 7789-12-0(CAS DataBase Reference)
- EPAの化学物質情報
- Disodium dichromate dihydrate (7789-12-0)
化学的性質
化学的特性Orange-yellow powder. Soluble in acids and hot water; insoluble in alcohol and ether.
安全と法規制
GHS分類
GHS Classification
Danger
H317 (100%): May cause an allergic skin reaction [Warning Sensitization, Skin]
P203, P261, P272, P273, P280, P302+P352, P318, P321, P333+P317, P362+P364, P391, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 2101 reports by companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Danger
H301: Toxic if swallowed [Danger Acute toxicity, oral]
危険有害性情報
Regulatory Information
Chemical: Chromic acid (H2Cr2O7), disodium salt, dihydrate
Chromic acid, disodium salt, dihydrate: HSNO Approval: HSR001440 Approved with controls
Other Safety InformationIMAP assessments - Chromates and dichromates (soluble): Human health tier II assessment
Hazards Summary
An oxidizer that may cause fire on contact with combustible materials; Causes burns; May cause skin and respiratory sensitization; Toxic by ingestion; Highly toxic by inhalation; Harmful by skin absorption; [Alfa Aesar MSDS] See Sodium dichromate. See Chromium and linked occupational diseases.
Hazard Classes and Categories
Skin Sens. 1 (100%)
Carcinogenicity - category 1A
Acute toxicity (Oral) - Category 3
安全と保護具
Threshold Limit Values (TLV)
0.0001 [mg/m3], as Cr(VI), inhalable particulate matter
0.0005 [mg/m3], as Cr(VI), inhalable particulate matter
Permissible Exposure Limit (PEL)0.005 [mg/m3], as Cr(VI)
Protective Action Criteria (PAC)
0.017 [mg/m3]
0.62 [mg/m3]
3.7 [mg/m3]
毒性情報
Adverse EffectsNephrotoxin - The chemical is potentially toxic to the kidneys in the occupational setting.
Carcinogen Classification
Sodium Dichromate Dihydrate
TR-546: Toxicology and Carcinogenesis Studies of Sodium Dichromate Dihydrate (CASRN 7789-12-0) in F344/N Rats and B6C3F1 Mice (Drinking Water Studies) (2008 )
05/16/07
Clear Evidence
Clear Evidence
Clear Evidence
安全データ
- wgk
- 3
- tsca
- Yes
- rtecs
- HX7750000
- ridadr
- UN 3086 6.1/PG 1
- PRTR法
- 第1種指定化学物質(特定物質)
- hs_code
- 28413000
- risk_code
- 45-46-60-61-8-21-25-26-34-42/43-48/23-50/53
- 化審法
- 一般化学物質
- 安衛法
- 特定化学物質障害予防規則:第2類物質,57,57-2
- hazard_code
- O,T+,N
- safety_code
- 53-45-60-61
- hazard_class
- 5.1
- packing_group
- III
- 毒劇物取締法
- III
- 特定化学物質
- 特38-311
- Hazard Classifications
- Acute Tox. 2 InhalationAcute Tox. 3 OralAcute Tox. 4 DermalAquatic Acute 1Aquatic Chronic 1Carc. 1BEye Dam. 1Muta. 1BOx. Sol. 2Repr. 1BResp. Sens. 1Skin Corr. 1BSkin Sens. 1STOT RE 1 Inhalation
- ストレージクラス
- 5.1B - Oxidizing hazardous materials
化学と産業
用途と製造
Uses
Used as an oxidizing agent (to make dyes, inks, and other chemicals), bleaching agent (fats, oils, sponges, and resins), tanning agent, and mordant in dyeing; Also used in electric batteries, for refining petroleum, electro-engraving copper, in corrosion inhibitors and corrosion inhibiting paints, metal treatments, hardening gelatin, defoliation of cotton and other plants and shrubs, and as a topical anti-infective; [Merck Index] Used for metal finishing (chrome plating, electroplating, passivating, anodizing, and brightening), to make vitamin K, colored glass, ceramic glazes, essential oils, and perfumes; [ExPub: ECHA - Annex XV Dossier] Found as a contaminant in drinking water from industrial uses including electroplating, leather tanning, and textile manufacturing; [NTP]
Electroplating [Category: Plate]
応用分野
解説重クロム酸のナトリウム塩。正式名称は二クロム酸ナトリウムsodium dichromateという。クロム鉱から、炭酸カリウムのかわりに炭酸ナトリウムを用い、重クロム酸カリウムと同様な方法でつくられる。冷水溶液からは二水和物が結晶し、これを加熱すると84.6℃で無水和物（式量262.0）となる。
用途染色媒染剤、金属表面処理
用途染料、防腐剤
用途クロムなめし,クロム酸系顔料?染料原料,酸化剤,媒染剤,医薬?サッカリン等製造用 (NITE CHRIP)
使用Sodium Dichromate Dihydrate is used as a catalyst in the synthesis of Endoperoxide II. Strong oxidizing agent in organic synthesis. Used in metal finishing as an aid in corrosion resistance.
一般的な説明Solid orange-yellow crystal or powder.
調製方法
純化方法Crystallise the dichromate from small volumes of H2O by evaporation to crystallisation. Its solubility in H2O is 238% at 0o and 508% at boiling. The red dihydrate is slowly dehydrated by heating at 100o for long periods. It is deliquescent and is a powerful oxidising agent—do not place it in contact with skin— wash immediately as it is caustic. (Possible carcinogen.) Sodium dihydrogen orthophosphate ( 2 H2O) [13472-35-0 (2H2O), 10049-21-5 (H2O), 7558-80-7 (anhydrous)] M 156.0, m 60o(dec), d 4 1.91. Crystallise it from warm water (0.5mL/g) by chilling.
上流・下流製品情報
上流原料
下流製品
補足説明
定義A red crystallinesolid, Na2Cr2O7.2H2O, solublein water and insoluble in ethanol. Itis usually known as the dihydrate(r.d. 2.52), which starts to lose waterabove 100°C; the compound decomposesabove 400°C. It is made bymelting chrome iron ore with limeand soda ash and acidification of thechromate thus formed. Sodiumdichromate is cheaper than the correspondingpotassium compound buthas the disadvantage of being hygroscopic.It is used as a mordant in dyeing,as an oxidizing agent in organicchemistry, and in analytical chemistry.
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