| 1902 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1500 | A New Dictionary of Kanji Usage |
| 3191 | Classic Nelson (Andrew Nelson) |
| 1596 | Essential Kanji (P.G. O’Neill) |
| 1571 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1856 | Kanji and Kana (Spahn and Hadamitzky) |
| 2012 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1551 | Kanji in Context (Nishiguchi and Kono) |
| 1405 | Kodansha Compact Kanji Guide |
| 1519 | Kodansha Kanji Dictionary (Jack Halpern) |
| 803 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1096 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 770 | Les Kanjis dans la tete (Yves Maniette) |
| 24229 | Morohashi |
| 1184 | New Japanese English Character Dictionary (Jack Halpern) |
| 4006 | New Nelson (John Haig) |
| 763 | Remembering The Kanji (James Heisig) |
| 825 | Remembering The Kanji, 6th edition (James Heisig) |
| 1573 | Tuttle Kanji Cards (Alexander Kask) |
sulphur
- On:
- リュウ
Jōyō kanji, taught in junior high
JLPT level N1
1867 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 硫化 【リュウカ】 sulfuration, sulphuration
- 硫安 【リュウアン】 ammonium sulfate
- 脱硫 【ダツリュウ】 desulfurization, desulphurisation, desulphurization
- 加硫 【カリュウ】 vulcanizing (rubber)
Readings
- Korean:
- ryu
Spanish
- azufre abreviatura de ácido sulfúrico
Portuguese
- enxofre
French
- soufre
| 3357 | 2001 Kanji |
| 5a7.3 | The Kanji Dictionary |
| 1-5-7 | SKIP code |
| 1061.3 | Four corner code |
| 1-46-18 | JIS X 0208-1997 kuten code |
| 786b | Unicode hex code |
Jōyō kanji, taught in grade 5
JLPT level N1
1218 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 酸 【サン】 acid, sourness, sour taste
- 酸化 【サンカ】 oxidation, oxidization
- 炭酸 【タンサン】 carbonic acid, carbonated water, carbonated drink, baking soda, sodium carbonate
- アミノ酸 【アミノサン】 amino acid
Kun reading compounds
- 酸い 【すい】 sour, acid
- 酸葉 【すいば】 sorrel (Rumex acetosa), Common sorrel, garden sorrel, spinach dock
Readings
- Korean:
- san
Spanish
- ácido
- agrio
Portuguese
- ácido
- amargo
- azedo
- picante
French
- acide
- aigre
- amer
- sur (goût)
| 618 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 715 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 689 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1027 | A New Dictionary of Kanji Usage |
| 4789 | Classic Nelson (Andrew Nelson) |
| 819 | Essential Kanji (P.G. O’Neill) |
| 1838 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 516 | Kanji and Kana (Spahn and Hadamitzky) |
| 525 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1420 | Kanji in Context (Nishiguchi and Kono) |
| 1797 | Kodansha Compact Kanji Guide |
| 1968 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1049 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1415 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1449 | Les Kanjis dans la tete (Yves Maniette) |
| 39871 | Morohashi |
| 1563 | New Japanese English Character Dictionary (Jack Halpern) |
| 6177 | New Nelson (John Haig) |
| 1437 | Remembering The Kanji (James Heisig) |
| 1545 | Remembering The Kanji, 6th edition (James Heisig) |
| 791 | Tuttle Kanji Cards (Alexander Kask) |
| 3267 | 2001 Kanji |
| 7e7.2 | The Kanji Dictionary |
| 1-7-7 | SKIP code |
| 1364.7 | Four corner code |
| 1-27-32 | JIS X 0208-1997 kuten code |
| 9178 | Unicode hex code |
Jōyō kanji, taught in grade 3
JLPT level N2
672 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 鉄 【テツ】 iron (Fe), steel, iron (will, discipline, lady, etc.), railway, railway enthusiast
- 鉄製 【テッセイ】 made of iron
- 国鉄 【コクテツ】 national railway, Japan National Railways (1949-1987)
- 新日本製鐵 【シンニッポンセイテツ】 Nippon Steel Corporation
Kun reading compounds
- 黒金 【くろがね】 iron
Readings
- Japanese names:
- けん、 てっ
- Korean:
- cheol
Spanish
- hierro
- acero
Portuguese
- ferro
French
- fer
| 283 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 374 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 353 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 327 | A New Dictionary of Kanji Usage |
| 4844 | Classic Nelson (Andrew Nelson) |
| 242 | Essential Kanji (P.G. O’Neill) |
| 976 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1948 | Japanese Names (P.G. O’Neill) |
| 2.1 | Japanese for Busy People |
| 312 | Kanji and Kana (Spahn and Hadamitzky) |
| 312 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 147 | Kanji in Context (Nishiguchi and Kono) |
| 1814 | Kodansha Compact Kanji Guide |
| 2147 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1126 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1527 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 854 | Les Kanjis dans la tete (Yves Maniette) |
| 40285 | Morohashi |
| 1711 | New Japanese English Character Dictionary (Jack Halpern) |
| 6253 | New Nelson (John Haig) |
| 846 | Remembering The Kanji (James Heisig) |
| 909 | Remembering The Kanji, 6th edition (James Heisig) |
| 449 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 422 | Tuttle Kanji Cards (Alexander Kask) |
| 2863 | 2001 Kanji |
| 8a5.6 | The Kanji Dictionary |
| 1-8-5 | SKIP code |
| 8513.0 | Four corner code |
| 1-37-20 | JIS X 0208-1997 kuten code |
| 9244 | Unicode hex code |