| B633 | Rifampicin（利福平） | 100mg原装/250mg/1g原装 | 120/260/850 | INALCO1758-9315 |
| B634 | RNaseA(核糖核酸酶A) | 25mg/100mg | 150/550 | Sigma分装 |
| B635 | RNaseInhibitor(RNA酶抑制剂) | 2500u/1000u | 850/100 | Promega原/BBI分装 |
| B636 | Rosebengal(虎红) | 5g/25g原装 | 370/1690 | Sigma R-3877 |
| B640 | SabouraudDextroseagar(沙氏葡糖琼脂) | 500g原装/2kg原装 | 530/1850 | BD 210950 |
| B641 | SafraninO(番红O) | 5g/10g/50g/100g原装 | 150/260/1050/1850 | Sigma S2255 |
| B642 | SalmonSpermDNA(鲑鱼精DNA) | 100mg/1g/5g原装 | 120/1050/4540 | Sigma D1626 |
| B643 | Saponin(皂素（肥皂草素）) | 10g/100g | 90/600 | 国产 |
| B644 | SDS十二烷基磺酸(硫酸)钠 | 100g/100ml | 90/50 | CNI分装 |
| B645 | SerumPowder(消化血清粉) | 1kg | 680 | 国产 |
| B646 | Silane（Bind--Silane亲和硅烷） | 25ml 原装 | 1410 | Pharmacia17133001 |
| B647 | Silane（Repel-Silane疏水硅烷） | 500ml原装 | 1380 | Pharmacia17133201 |
| B648 | Snailase(蜗牛酶) | 1g/10g/100g/1kg | 50/300/2700/18000 | 国产 |
| B649 | SOD(超氧化物歧化酶(6000U/mg)) | 100mg | 260 | 国产 |
| B650 | SodiumAzide(叠氮钠) | 50g/250g/5kg原装 | 110/480/9250 | Amresco 0639 |
| B652 | SodiumBorate(四硼酸钠) | 100g/500g/2.5kgX4原装 | 180/610/3250 | Sigma S9640 |
| B653 | SodiumChloride(氯化钠) | 500g/1kg/5kg/5kg原装 | 120/200/880/1050 | Amresco X190 |
| B654 | SodiumPhosphate(磷酸二氢钠) | 500g | 200 | Amresco分装 |
| B655 | SodiumPhosphate(磷酸氢二钠) | 500g | 280 | Amresco分装 |
| B656 | Spectinomycin(壮观霉素) | 500mg原装/1g/5g原装 | 120/180/780 | INALCO1758-9311 |
| B657 | Spermidine(亚精胺，精脒) | 1g/5g/25g原装 | 310/1400/6340 | Sigma S0266 |
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